taxonID	type	description	language	source
355087D8FFF1E4681870FE6CEBFEC731.taxon	description	urn: lsid: ipni. org: names: 77215402 - 1 Figs 4 – 5	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF1E4681870FE6CEBFEC731.taxon	diagnosis	Diagnosis Differs from all other species of Chassalia in Borneo in the stem, petioles, abaxial venation of leaves, peduncles and fruits being blackish purple, both when dried and living (field notes); flowers cream white flushed purple-black; stipule long, elliptic; inflorescence well-developed, peduncle long, bracts of tertiary peduncle usually long, lanceolate.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF1E4681870FE6CEBFEC731.taxon	etymology	Etymology The epithet reflects the blackish purple coloration of stem, petioles, abaxial venation of leaves, peduncles and fruits which is distinct compared to all other Bornean species of Chassalia.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF1E4681870FE6CEBFEC731.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • 2 nd Division, Lubok Antu District, Lanjak-Entimau P. F., Bukit Lanjak; 14 Mar. 1974; Paul Chai S 33830; holotype: K [K 001129719]! [K 001129720]! (2 sheets 1 specimen); isotypes: L, KEP [KEP 271656]! [KEP 271657]! (2 sheets 1 specimen), MO, SAN. Additional material MALAYSIA – Borneo, Sarawak • 7 th Division, Ulu Sg. Kapit, Summit of Bukit Goram; 28 Feb. 1975; Paul Chai S 36121; K!, L, KEP, MO, SAN • Sri Aman Division, Ulu Batang Ai, Bukit Lanjak; alt. 1350 m; 6 Mar. 1994; Yii Puan Ching et al. S 67509; K!, KEP, L, SAN • 2 nd Division, Bukit Bangai, Ulu Lemanak; alt. 915 m; 26 Oct. 1961; S. Collenette 842; K!.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF1E4681870FE6CEBFEC731.taxon	description	Description Shrub to small treelet, 0.8 – 1.5 m tall, glabrous. Stem blackish purple, terete, not hollow. Internodes deeply canaliculate, (1.5 –) 3.5 – 7.5 cm long. Leaf-blades narrowly elliptic to lanceolate, 9 – 16 × 1.5 – 4 cm, apex acuminate, acumen 0.5 – 1.3 cm long, base cuneate to attenuate, first pair of leaves from apex sometimes very small, 1 – 3 cm × 3 – 5 mm. Petiole blackish purple, slightly flattened, 0.9 – 1.5 cm long. Midrib and secondary veins slightly raised both abaxially and adaxially, secondary veins 8 – 12 on each side of the midrib and blackish purple abaxially, leaf-blade sometimes slightly impressed around secondary veins, tertiary veins not visible. Stipule elliptic to trapezoidal, 2 – 12 × 3 – 9 mm, broken stipules from lower nodes sometimes slightly bilobed. Inflorescences compound cymes, usually well-developed, peduncle canaliculate, (1.5 –) 3.5 – 6 cm long blackish purple, bracts of first internode of rachis and first branches elliptic, 4 – 5 × 1.5 – 2 mm, first internode of rachis and first branches canaliculate, (0.5 –) 1.5 – 6 cm long, bract of second internode of rachis and second branches ovate, 3 × 3 mm, second internode of rachis and second branches 1 – 2 cm long. Bracts of capitulum 4, 2 × 1 mm. Flowers ca 10 in each capitulum, more or less sessile, hypanthium ca 1 mm long, calyx tube ca 0.5 mm long, lobes triangular, ca 0.2 mm long, corolla white flushed purple, 11 – 12 mm long at largest point in bud before corolla lobes separate, lower tube straight, ca 5 mm long, 0.5 – 0.8 mm diameter, distal portion inflated, turbinate with top domed, ca 6 mm long, ca 3 mm maximum diameter, corolla lobes oblong-ovate 2 – 3 × 2 mm, apex apiculate with a thickened tip. Stamens 2 × 0.4 mm, 2 mm from apex of corolla tube, 6.5 mm from base of corolla tube, anthers with an apical connective appendage 1 mm long, filaments very short, less than 0.1 mm long, band of hairs at base of stamens 1 mm wide, each hair around 0.2 mm long. Style 12 mm long, exserted about 2 mm from mouth of corolla, stigma bilobed, each lobe orbiculate, 0.8 mm diameter. Disc cylindric, 0.8 × 0.8 mm. Fruits ellipsoid, 6 × 5.5 × 4.5 mm, dark purple to iridescent blue, calyx persistent, not accrescent, 2 × 2 mm, disc persistent, not accrescent, 0.5 × 1.2 mm. Pyrene plano-convex, 8 – 9 × 5.5 × 2.5 – 3 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.4 mm wide, 0.25 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 1 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.5 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.4 mm wide, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.8 mm × 0.2 mm. PGS not detected. Seed light brown, hemi-ellipsoid, 0.5 mm × 6 mm, longitudinally slightly crested at midline of dorsal surface, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF1E4681870FE6CEBFEC731.taxon	distribution	Distribution, habitat Borneo: Sarawak. High-altitude (910 – 1350 m a. s. l.) summit montane forest, open places.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF2E46D181BFCF4EA7DC735.taxon	description	urn: lsid: ipni. org: names: 77215403 - 1 Figs 6 – 7	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF2E46D181BFCF4EA7DC735.taxon	diagnosis	Diagnosis Differs from other big-leaved species in having leaves clustered at apex of stem, in infructescences mostly terminal, in fruits significantly obovoid (fruits of most other Asian species of Chassalia are ovoid or round).	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF2E46D181BFCF4EA7DC735.taxon	etymology	Etymology Named after American botanist, John Homer Beaman (1929 – 2015), who collected this species and most other specimens of Chassalia from around Mount Kinabalu.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF2E46D181BFCF4EA7DC735.taxon	materials_examined	Type MALAYSIA – Borneo, Sabah • Ranau District, near Poring Hot Springs along trail to tourist canopy walkway; 6 ° 03 ′ N, 110 ° 42 ′ E; 9 Aug. 1990; John H. Beaman 10924; holotype: K [K 001129721]!; isotype: MSC. Additional material MALAYSIA – Borneo, Sabah • Ranau District, Kampung Melangkap Tomis, 3 km dari Melangkap Tomis; 10 Sep. 1995; Lorence Lugas 954; K!, SNP • Kawasan Labi; 14 Jan. 1996; Lorence Lugas 1676; K!, SNP.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF2E46D181BFCF4EA7DC735.taxon	description	Description Shrub or small treelet, around 1 m tall, glabrous. Stem terete, hollow, slightly flattened when dry, 4 – 6 (– 8) mm wide; successive nodes flattened at right angles, internode on the flowering branch 1 – 3 cm long, gradually compressed at apex. Leaves opposite, decussate. Leaf-blades obovate to broadly elliptic, 21 – 28 × 7 – 11 cm, broadest at about middle or above; apex acute to attenuate; base attenuate; midrib slightly raised above, domatia absent; secondary nerves 12 – 18 on each side of the midrib, prominent above. Petioles flattened, canaliculate, 3 – 4 × 0.1 – 0.2 cm, 1 cm long when immature. Stipule not sheathing, broadly flabellate, 5 – 10 × 8 – 15 mm, apex broken very easily, base drying deep brown, 5 – 8 × 8 – 10 mm, sometimes very small, 3 × 2 mm; margin light brown. Inflorescences compound cymes, 1.5 – 4 cm long; peduncle 8 – 20 × 2 mm, rachis and branches 3 – 15 mm or absent. Bracts 4 – 9 in each capitulum, 3 – 6 × 3 – 4 mm. Flowers not seen. Fruits obovoid, broadest at ¾ from base, 6 – 7 × 4 – 6 mm, with 2 – 3 veins visible on pericarp; pedicel of fruit short, 2 – 3 mm; calyx tube persistent or broken, 0.5 – 1 × 1 – 2 mm, lobes usually broken. Disc persistent, longer than persistent calyx tube, 0.8 – 1.2 × 0.7 – 0.8 mm. Pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.1 × 0.3 mm, curved, 0.3 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.3 × 0.6 mm, with a groove between the edge of endocarp and endocarpal outgrowth 0.2 – 0.3 mm wide. Raphal opening at base of the endocarpal outgrowth, narrowly ovoid, 0.5 × 0.2 mm, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.5 – 0.7 × 0.2 – 0.3 mm. PGS not detected. Seed light brown, hemi-ellipsoid, slightly crested at central part of dorsal side, 0.3 × 4 mm, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF2E46D181BFCF4EA7DC735.taxon	distribution	Distribution, habitat Endemic to Borneo. Only known from the Ranau District of Sabah. Lowland forest, alt. 650 – 750 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF7E46C183BFCFFEDDCC02E.taxon	description	Description Shrub to small tree, height unknown. Stem terete, canaliculate with 2 longitudinal grooves when dry. Internodes 1.5 – 3.5 cm long. Stipule flabellate, 4 – 5 × 6 – 8 mm, Leaf-blades obovate to elliptic, 27 – 29 × 8.5 – 9 cm, apex acuminate, acumen 1 – 1.5 cm, base truncate, slightly decurrent to petiole, midrib slightly raised at adaxial and abaxial, secondary nerves 12 from each side of the midrib. Petioles 2.5 – 3.5 cm long, 1.5 – 2 mm wide. Inflorescence / flowers not seen. Infructescence one per stem, compound cyme with 3 capitula appearing as one head, 4 cm long, peduncle 3 × 0.3 mm, branches and rachis 2 – 4 mm long, bracts of rachis and branches 2, ovate, 0.5 × 0.4 mm, bracts of capitulum ovate with a chaffy edge, 4 – 5 × 5 mm. Pedicel of fruit 3 – 5 mm long. Fruit ellipsoid to ovoid, 8 – 11 × 5 – 7 × 5 mm, calyx persistent, not accrescent, 3 × 1 mm, disc persistent, not accrescent, 0.8 × 0.8 mm, fruit surface convex, with two adjacent parallel longitudinal crests 0.4 mm wide, 0.6 mm apart along their length, forming a longitudinal groove from apex to base between the two crests. Pyrene not seen.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF7E46C183BFCFFEDDCC02E.taxon	distribution	Distribution, habitat Java (Indonesia) and Borneo (Brunei). Lowland evergreen forest.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF7E46C183BFCFFEDDCC02E.taxon	discussion	Remarks The lectotype specimen of Chassalia blumeana [L 0057738] was collected in Java. The infructescence of the lectotype specimen is a 3 - branched compound cyme with branches and rachis 2 – 4 mm long. The branches and rachis remain short during fruit maturation. The exact distribution of this species in Borneo is unknown. The specimen most similar to the lectotype found in Borneo from the Kew herbarium is: BRUNEI • Bang Dangung, Bila pinggan group; 12 Jul. 1993; Jay H. Bernstein JHB 405; K!. Chassalia blumeana differs from other species by the base of the inflorescence peduncle not having bracts, and by having the branches and rachis of the infructescence less than 5 mm long. It differs from Chassalia ramosa T. Y. Yu sp. nov. by having just 1 flowering branch, rather than two or more per stem. Chassalia blumeana may be the taxonomically most difficult species among all Asian species of Chassalia. Most of the specimens of Chassalia from Borneo were previously identified as Cephaelis psychotrioides (= Chassalia psychotriformis) and Cephaelis stipulacea (synonym of Chassalia blumeana). These specimens contain a wide range of morphological variation. The lectotype specimen of Chassalia blumeana from Java shows that this species seems to have 1 peduncle and 3 capitula on highly reduced partial peduncles less than 0.5 cm long. This makes the inflorescence look as though it is one big capitulum. The description in the protologue indicates that this species is distributed from West to Central Java (Blume 1826 – 1827). Additional information is provided by the description and illustration of Valeton (1913 a). These highlight the short partial peduncles (5 – 10 mm long) which are slightly longer then the partial peduncle of the lectotype specimen. Valeton (1913 a) recorded it as distributed from Java and in Borneo from northwest Indonesian Borneo to southwest Malaysian Borneo (Kuching). In this survey, specimens which appear to be a reasonable match for the type specimen of C. blumeana have been found in both Indonesian Borneo and Malaysian Borneo (Kuching), as well as Brunei. However, several specimens from west Sarawak to Sabah seem to share similarity with the typical C. blumeana but also vary somewhat from this species. Therefore, the delimitation of C. blumeana with similar specimens from Borneo still needs further study.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF6E4711811FB97EEAEC0C0.taxon	description	urn: lsid: ipni. org: names: 77215404 - 1 Figs 8 – 9	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF6E4711811FB97EEAEC0C0.taxon	diagnosis	Diagnosis Differs from other species in having a strong and thick, but hollow, stem 5 – 12 mm diameter (vs stem solid, ca 3 – 5 mm diameter); leaves large 17 – 33 × 5.5 – 12 cm (in most species except C. atropurpurea sp. nov. and C. involucrata sp. nov. not reaching these dimensions); inflorescence usually very short with peduncle very short or absent, (<0.1 –) 0.5 – 3.5 cm (in other species usually exceeding 3.5 cm long); secondary peduncle usually very short to absent making the inflorescence highly compact.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF6E4711811FB97EEAEC0C0.taxon	etymology	Etymology The epithet, treated as a noun in apposition, is derived from the Latin ʻ calamus ʼ, a reed or more generally a hollow-stemmed plant. The name refers to the hollow stem, unusual in Bornean species of Chassalia.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF6E4711811FB97EEAEC0C0.taxon	materials_examined	Type MALAYSIA – Borneo, Sabah • Nabawan, Sungai Millian, along stream-side; 18 Nov. 1986; Asik Mantor SAN 118683; holotype: K [K 001129723]!; isotype: SAN. Additional material MALAYSIA – Borneo, Sabah • Keningau, Crocker range area, mile 16, Kimanis Road; 23 Aug. 1986; Sumbing Jimpin SAN 120566; K!, KEP!, SAN • Tambunan, Sunsuron Km 54 Jalan Tambunan / Penampang; alt. 1400 m; 24 Aug. 1989; Fidilis. K. SAN 127894; K!, SAN • Ranau, Ulu Tungud Forest Reserve, Gunung Monkobo Expedition; 5 ° 52 ′ 45 ″ N, 116 ° 55 ′ 28 ″ E; alt. 343 m; Saw L. G. SAN 146079; K!, SAN • Tambunan, Rafflesia Information Centre, Hill Dipterocarp Forest; 2 Sep. 2001; J. T. Pereira et al. JTP 845; K!, SAN • Pandewan, Sungai Pamentarian; 25 Feb. 1987; Sumbing Jimpin SAN 120057; K!, SAN.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF6E4711811FB97EEAEC0C0.taxon	description	Description Herb, shrub to small treelet, (0.5 –) 1 – 1.5 m tall, glabrous. Stem terete, flattened and slightly canaliculate, or sometimes deeply canaliculate, hollow. Lower internodes 3 – 6 × 0.5 – 1.2 cm, surface usually covered by pustules, internode of flowering stems shorter, 1 – 2.5 × 0.3 – 0.8 cm. Leave-blades elliptic to broadly lanceolate, very large, 17 – 33 × 5.5 – 12 cm, midrib raised both adaxially and abaxially, secondary veins 14 – 18 on each side, petiole flat, canaliculate, (0.5 –) 1.5 – 5 cm. Stipule large, not sheathing, broadly flabellate, 0.8 – 1.2 × 0.8 – 2 cm, apex usually irregular. Inflorescence a compound cyme, peduncle very short to absent, (<0.1 –) 0.5 – 3.5 cm, rachis and branches usually very short to absent, (<0.1 –) 1.5 cm. Bracts 8 – 10 in each capitulum, pale green, 7 – 8 × 3 – 4 mm. Flowers 14 – 20 in each capitulum, pedicel short or absent, hypanthium ellipsoid, 1.5 × 1.5 – 2 mm, calyx tube slightly curved, 1.5 – 1.8 × 0.5 mm in total, corolla whitish green, cream-white or yellowish white, 10 – 12 × 0.5 mm, corolla tube 0.5 mm wide at base, broadening in distal third to 2.5 mm wide; corolla lobes triangular, 2 – 2.5 × 1.5 mm. Disc cylindric, 0.8 × 0.5 mm. Stamens 2.2 × 0.2 mm, anthers placed at the mouth of corolla, filament insertion 8 mm from base of corolla, filament very short, less than 0.1 mm long, band of hairs 0.5 – 1 mm wide, at base of stamens 8 mm from mouth of corolla tube, hairs erect, colourless, 0.1 – 0.2 mm long. Style 1.5 cm long. Fruits ellipsoid, 5 – 8 × 4 – 5 × 3.5 – 4 mm, pedicel of fruit persistent, not accrescent or slightly accrescent, 3 – 4 mm long. Pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.1 × 0.25 mm, curved, 0.4 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.7 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.2 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.2 mm in diameter, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.5 × 0.2 mm. PGS not detected. Seeds light brown, hemi-ellipsoid, slightly crested at central part of dorsal side, 4.5 × 0.7 mm.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFF6E4711811FB97EEAEC0C0.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sabah, around Ranau and Tambunan. Hill forest, stream valley, rocky moist slopes, alt. 125 – 1300 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEBE476180AFABDEBDEC219.taxon	description	urn: lsid: ipni. org: names: 77215405 - 1 Figs 10 – 11	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEBE476180AFABDEBDEC219.taxon	diagnosis	Diagnosis Differs from all other Kinabalu species of Chassalia in having elliptic to ovate leaves, in the first internode of flowering branches usually very short (1.5 – 4 cm long), in having 3 peduncles, the main rachis with 3 capitula, and in the bracts of the capitulum being so big that usually they cover the flower buds.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEBE476180AFABDEBDEC219.taxon	etymology	Etymology Named after Chew Wee Lek who was the collector of most specimens of this new species.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEBE476180AFABDEBDEC219.taxon	materials_examined	Type MALAYSIA – Borneo, Sabah • Mt Kinabalu, Ulu Langanani, Sungai Mamut; 6 ° 04 ′ N, 116 ° 40.44 ′ E; alt. 4000 ft; 4 Aug. 1961; fl.; W. L. Chew, E. J. H. Corner & A. Stainton 1226; holotype: K [K 001129712]!. Additional material MALAYSIA – Borneo, Sabah • Mt Kinabalu, Ulu Liwagu and Ulu Mesilau; 6 ° 00 ′ N, about 116 ° 35 ′ E; alt. 5000 ft; 6 Sep. 1961; fl.; W. L. Chew, E. J. H. Corner & A. Stainton 2807; K! • Mt Kinabalu, Ulu Liwagu and Ulu Mesilau; 6 ° 00 ′ N, about 116 ° 35 ′ E; alt. 5000 ft; 22 Aug. 1961; fl.; W. L. Chew, E. J. H. Corner & A. tainton 1948; K! • Mount Kinabalu, Dallas; 3000 ft; 1 Dec. 1931; fr.; J. & M. S. Clemens 27341; K! • Mount Kinabalu, Tenompok; 5000 ft; 12 – 23 Feb. 1932; fr.; J. & M. S. Clemens 30336; K! • Mt Kinabalu, Tenompok; 5000 feet; 19 Feb. 1932; fr.; J & M. S. Clemens 30335; K! • Mt Kinabalu, Ulu Liwagu and Ulu Mesilau; 6 Sept. 1961; fr.; W. L. Chew, E. J. H. Corner & A. Stainton 2804; K!.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEBE476180AFABDEBDEC219.taxon	description	Description Herb to small treelet, 0.4 – 0.9 m tall, apparently unbranched, glabrous. Lower internodes terete, 2.5 – 4.5 (– 7.5) × 0.3 – 0.5 cm, upper internodes usually drying flattened, strongly canaliculate, slightly broadened at apex, 1.5 – 4 cm long, base 2 – 4 mm wide, apex 3 – 5 mm wide, flowering internodes sometimes highly reduced, 0.5 – 1.5 cm long. Leaf-blades ovate to elliptic, 11 – 16 (– 21) × 3 – 6.5 cm, margin entire, apex acute to acuminate, acumen 1 – 1.5 cm, base cuneate; midrib slightly raised above, domatia absent; secondary nerves 10 – 12 on each side of the midrib, prominent above; tertiary nerves not visible. Petiole flattened, canaliculate, (1.5 –) 2 – 6.5 cm × 0.8 – 1.5 mm. Stipule not sheathing, broadly flabellate, 0.5 – 1.2 × 0.8 – 1.8 cm, margin entire, apex usually broken. Inflorescences compound cymose, 3.5 – 5.5 cm long; peduncle very short to absent; first branches slightly flattened distally, 25 × 1 mm; rachis 4 – 4.5 cm long; second branches of rachis cymose, 15 – 20 × 1 mm; bracts of second branches 8 – 10 × 4 mm, exceeding the flowers and fruits. Flowers sessile in terminal clusters. Hypanthium obovoid, glabrous inside and out, 2 – 3 mm in total; sepals 5, each broadly triangular, 0.5 × 1 mm. Corolla cream white, tube 7 – 8 mm long, broadening from midway to top, lower part 1.5 mm wide, apex 5 mm wide; lobes triangular, 3.5 – 4 × 3 – 4 mm, apex acute or apiculate. Stamens 2.3 – 2.5 mm long, with short spur 0.2 mm long; filaments flat and short, mostly hidden under anthers, 0.2 – 0.3 mm long. Style 7 – 8 mm long, slightly exserted out of corolla tube; stigma flat and large, 1.5 × 3 – 3.5 mm, bilobed, with a slightly raised margin less than 0.5 mm long, centre slightly hollowed. Disc conspicuous, cylindrical with a flat top, 0.5 × 1 mm. Fruit green maturing blue, deep brown when dry, ovoid to ellipsoid, 5 – 6 × 4 – 5 mm, junction between the two pyrenes slightly grooved, calyx persistent, lobes 5, 0.2 × 0.5 mm. Pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.2 – 0.3 mm wide, curved, 0.4 – 0.5 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.8 – 1.0 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.2 – 0.4 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.2 mm long, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.8 – 1 × 0.2 mm. PGS not detected. Seed brown, hemi-ellipsoid, slightly crested at central part of dorsal side, 0.5 × 4 mm, endosperm at central part of the seed, 0.2 – 0.3 mm wide.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEBE476180AFABDEBDEC219.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sabah, around Mount Kinabalu. Lower montane forest, alt. 900 – 1500 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFECE4751864F9DBEEEBC76D.taxon	materials_examined	Enumeratio Plantarum Zeylaniae (2): 150 (Thwaites 1859). – Psychotria curviflora Wall. in Roxburgh, Flora indica 2: 167 (Roxburgh 1824). – Uragoga curviflora (Wall.) Kuntze, Revisio Generum Plantarum 1: 299 (Kuntze 1891 b). – Type: MALAYSIA • Penang; 1819; W. Jack s. n. [EIC 8360 A]; hololectotype: K-W [K 001125306]!, designated at the first step by Deb & Krishna (1983: 221) and at the second step by Turner (2019: 397). Psychotria lurida Blume, Bijdragen tot de flora van Nederlandsch Indië 16: 959 (Blume 1826). – Zwaardekronia lurida (Blume) Korth., Nederlandsch Kruidkundig Archief 2 (2): 252 (Korthals 1851). – Chassalia lurida (Blume) Miq., Flora van Nederlandsch Indië 2 (2): 282 (Miquel 1857). – Chassalia curviflora var. lurida (Blume) Hochr., Candollea 5: 270 (Hochreutiner 1934). – Type: JAVA • C. L. Blume 2270; hololectotype: L [L. 2950785], designated by Turner (2019: 397). Chassalia chartacea Craib, Bulletin of Miscellaneous Information, Kew 1931: 279 (Craib 1931). Type: THAILAND • Surat, Yanyao; 21 Feb. 1930; A. F. G. Kerr 18175; holotype: K [K 000761880]! [K 001129592]! (2 sheets); isotype: BM [BM 000945616].	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFECE4751864F9DBEEEBC76D.taxon	description	For a more extensive synonymy see Turner (2019).	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFECE4751864F9DBEEEBC76D.taxon	distribution	Distribution, habitat India to the Philippines. Lowland evergreen forest.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFECE4751864F9DBEEEBC76D.taxon	discussion	Remarks Chassalia curviflora is taken here as a single widespread (India to the Philippines) and variable species. Revision of this complex was beyond the scope of the present study, and only a single entity is keyed out above for Borneo.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEFE47A1864FC28EA6EC181.taxon	description	urn: lsid: ipni. org: names: 77215406 - 1 Fig. 12 – 13	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEFE47A1864FC28EA6EC181.taxon	diagnosis	Diagnosis Differs from other species of Chassalia in Borneo in having large leaves up to 48 cm long and 15 cm wide (they are much smaller in other species), in the capitulum having outer and inner bracts up to 1.5 cm wide (broader than in any other species), in the infructescences usually persisting for a whole season until new inflorescences are produced (not soon disappearing after fruit maturity). Most similar to, but differing from, C. calamus sp. nov. in having bracts usually longer than the flower bud (not shorter), in having a longer peduncle, in having bigger leaves (to 48 × 12 cm, not to 33 × 12 cm) and more secondary veins (up to 26 on each side of the midrib, not <18), and in having longer (4 – 14 cm, not <5 cm) petioles.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEFE47A1864FC28EA6EC181.taxon	etymology	Etymology The epithet alludes to the involucrate bracts of rachis and capitulum, which are larger and more conspicuous than in other species of the genus in Borneo.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEFE47A1864FC28EA6EC181.taxon	materials_examined	Type BRUNEI • Temburong district, Kuala Belalong, Batu Apoi Forest Reserve, at the Sungai Engkiang River, towards the Sungai Belalong, below Pondok Engkiang; 115 ° 09 ′ E, 4 ° 33 ′ N; 22 Nov. 1991; Carlo Hansen 1608; holotype: K [K 001129724]!. Additional material BRUNEI • S. Belalong below Kuala Ropan; 11 Feb. 1959; P. S. Ashton BRUN 5227; BRUN, K!, SING!, BRUN • Temburong District, LZ 298, beside the Temburong River; 19 Sep. 1988; W. K. Wong WKM 484; K!, SING!. MALAYSIA – Borneo, Sabah • Tambunan District, Crocker Range, Km 64 on Kota Kinabalu – Tambunan Road; 5 ° 46 ′ N, 116 ° 21 ′ W; alt. 1250 m; 11 Oct. 1983; John Beaman 7268; K!, MSC, UKMS. – Borneo, Sarawak • Kuching District, 12 th mile Penrissen Road; 19 Sep. 1966; Banyeng ak Nudong et Benang ak Bubong, S 25474; A, BO, K!, L, SAN, SING, SAN, A, BO • Nanga Segera Base Camp, Ulu Engkari, Lanjak Entimau, Wildlife Sanctuary; 4 Jun. 1998; Kit Pearce, Awg Enjah S 78122; K!, KEP, L.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEFE47A1864FC28EA6EC181.taxon	description	Description Herb, semi-woody shrub to small tree, 1 – 4 m tall, glabrous. Stem strong and thick, 0.5 – 0.7 cm wide, slightly hollowed or not. Internodes 3 – 13.5 cm long, thick, sometimes slightly canaliculate, slightly broadening at apex. Stipules big, flabellate, 1 – 1.5 × 1 – 2 cm, base usually divided into 2 parts. Leafblades large, broadly elliptic, 13 – 36 × 6 – 15 cm, midrib slightly raised both abaxially and adaxially, secondary veins 14 – 26 on each side, apex acuminate, acumen 5 – 18 mm long, base cuneate or attenuate, petiole long, 4 – 14 cm × 1.5 – 3 mm. Peduncle (5 –) 20 – 25 × 1.5 – 3 mm, bracts of rachis and first branches 2, opposite, usually connate to half the length, each bract 1.5 – 2 × 1 – 1.2 cm, sheath 0.5 – 0.7 × 2 cm, rachis and secondary branches very short to absent, 2 – 6 mm long, bracts of secondary branches 2, not sheathing, 12 – 15 × 10 – 12 mm, bracts of each capitulum elliptic, 8 – 12 × 5 – 10 mm. Flowers sessile in each capitulum, 16 mm long. Hypanthium 2 × 0.5 mm, calyx tube 0.5 × 1.3 mm, calyx lobes broadly triangular, 0.2 × 0.5 mm. Corolla tube 20 × 1 mm, broadening to 3 mm from midway, glabrous except inside corolla tube a band of hairs 2 mm wide at base of stamens, 7 mm from mouth of corolla tube, hairs erect, colourless, 0.1 – 0.2 mm long; corolla lobes 5, triangular, 4.5 × 2 mm. Stamens 2.5 mm long, slightly concave, base bifurcate, inserted 2 mm from mouth of corolla, filaments very short and broad, less than 0.1 mm long. Style probably exserted, stigma bilobed, lobes orbiculate, 1 × 0.8 mm. Disc cylindric, 1 × 1 mm, apex flat. Fruit sessile, ellipsoid, 7 × 5 × 4 mm, ripening blue, calyx persistent, not accrescent, 0.5 × 1.5 mm, disc persistent, not accrescent, 0.7 × 0.7 mm. Pyrene plano-convex, 6 × 5 × 2 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.4 mm wide, 0.4 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.5 – 0.8 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.2 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.1 mm in diameter, 0.5 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.5 × 0.2 mm. PGS not detected. Seed light brown, hemi-ellipsoid, 0.5 × 5 mm, longitudinally slightly crested at midline of dorsal surface, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFEFE47A1864FC28EA6EC181.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sarawak, Sabah; Brunei. River banks in lowland forest, alt. 100 – 350 (– 1250) m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE0E4791873FA45EA18C01A.taxon	materials_examined	Feddes Repertorium 130: 398 (Turner 2019). – Coffea javanica Blume, Catalogus van eenige der merkwaardigste zoo in- als uit-heemsche gewassen, te vinden in ‘ s Lands Plantentuin te Buitenzorg opgemaakt door C. L. Blume, M. D., Directeur van voorz. tuin: 46 (Blume 1823). – Chiococca javanica (Blume) Blume, Bijdragen tot de flora van Nederlandsch Indië 16: 958 (Blume 1826). – Proscephaleium javanicum (Blume) Korth., Nederlandsch Kruidkundige Archief 2 (2): 248 (Korthals 1851). – Type: INDONESIA • Java, Tjapus; C. L. Blume s. n.; hololectotype: L [L 0057991], designated by Turner (2019: 398). Additional material MALAYSIA • Borneo, Gommisi Kap, Genderen Stort, G. Djempanga; Aug. 1912; Amdjah 729; K! • Borneo, Sarawak, Bintulu, Sungai Penyilam, Pengkalan Resam; 1 Oct. 2006; Julia S., Tan H. S., Malcom D., Rantai J. et al. S 97155; K!, SAR.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE0E4791873FA45EA18C01A.taxon	description	Description Epiphytic shrub, glabrous. Stem terete, slightly canaliculate when dry. Internodes broadening slightly at base and apex, (0.5 –) 2 – 4 (– 6) cm × 2 – 3 mm. Leaf-blades obovate to elliptic, 9 – 17 × 2 – 4.5 cm, apex acute to acuminate, acumen 5 mm long if acuminate, base truncate, midrib raised adaxially and abaxially, secondary nerves 8 – 11 on each side of the midrib, petioles 0.5 – 3 cm long. Stipule broadly triangular, 4 – 5 × 5 mm, sometimes bilobed when broken, margin with terminal colleters, inside with standard colleters 0.5 – 1 mm long. Inflorescence a compound cyme, 4.5 – 7 cm long, peduncle 0.8 – 4 cm long, internodes of rachis 0.5 – 1.5 cm long, each node of inflorescence including capitulum with 4 bracts, triangular, margin with teeth, 2 broader bracts 0.5 – 1.5 × 0.5 – 1 mm, 2 narrower bracts 1.5 × 0.5 mm. Open flowers not seen. Fruits narrowly ellipsoid, 5 – 6 × 4 mm, with pedicels 5 – 6 mm long. Pyrene dorsal surface rough, with a central longitudinal groove 1.5 – 2 mm wide, pyrene ventral surface with a central groove 1.5 – 2 mm wide and a ridge at centre of the groove 0.5 mm wide and as high as the plane of the endocarpal outgrowth, the 2 grooves between endocarpal outgrowth and pyrene margin 0.1 mm wide or absent. Seed not seen.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE0E4791873FA45EA18C01A.taxon	distribution	Distribution, habitat Malaysia, Borneo; Indonesia, Kalimantan, Java, Sumatra. Epiphytic in lowland to montane forest.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE0E4791873FA45EA18C01A.taxon	discussion	Remarks Differs from other Asian species of Chassalia by usually being epiphytic, by having narrowly ellipsoid fruits only 5 – 6 mm long, pyrenes with dorsal surfaces bearing a longitudinal groove but without a crest, and ventral surfaces with only 1 ridge, reaching as high as the plane of the endocarpal outgrowth.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE3E47E1877FBDCEA74C0FC.taxon	description	urn: lsid: ipni. org: names: 77215407 - 1 Figs 14 – 15	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE3E47E1877FBDCEA74C0FC.taxon	diagnosis	Diagnosis Similar to Chassalia atropurpurea sp. nov., differs in having green-brown, not dark purple stems, pedicels, midribs and inflorescence axes; in having a shorter peduncle, 3.5 cm long when flowering (not 3.5 – 6 cm long); differs also in having relatively long pedicels, 2 – 4 mm long (not subsessile or sessile).	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE3E47E1877FBDCEA74C0FC.taxon	etymology	Etymology The epithet alludes to Mount Kinabalu to which the new species is endemic.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE3E47E1877FBDCEA74C0FC.taxon	materials_examined	Type MALAYSIA – Borneo, Sabah • Mount Kinabalu, head of Liawagu River Trail; alt. 1800 – 1900 m; 6 ° 02 ′ N, 116 ° 33 ′ E; 23 Mar. 1995; John H. Beaman 11299; holotype: K [K 001129712]!; isotypes: UNIMAS, IBEC. Additional material MALAYSIA – Borneo, Sabah • Tenompok, Mount Kinabalu; alt. 1500 m; Jun. 1932; J. & M. S. Clemens 28169; K! • Mesilau River; alt. 1500 m; 27 Jan. 1964; RSNB 4157; K! • Ranau, Tenompok F. R., Lower Montane Forest; 30 Aug. 2001; JTP 825; K! • along the East Mesilau River between Mt Kinabalu golf course site and Mesilau Cave; 6 ° 03 ′ N, 116 ° 36 ′ W; alt. 1700 – 1900 m; 20 Dec. 1983; John H. Beaman 7977; K!, MSC, UKMS • Mt Kinabalu National Park, montane oak forest; alt. 1630 m; 27 May 1966; Ding Hou 227; K!, L.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE3E47E1877FBDCEA74C0FC.taxon	description	Description Shrub to treelet, 0.5 – 0.9 m tall, glabrous, stems green-brown (also pedicels, midribs and inflorescence axes). Internodes from flowering branch (1 –) 2 – 5 (– 9.5) cm × 2 – 4 mm, lower internodes terete, upper internodes usually flattened, canaliculate, broadening at apex, base 2 – 4 mm wide, apex 3 – 5 mm wide. Leaf-blades narrowly elliptic to narrowly oblanceolate, 13 – 21.5 × 3.5 – 5 cm, margin entire, apex acute, base cuneate; midrib slightly raised above, domatia absent; secondary nerves 8 – 12 on each side of the midrib, prominent above; tertiary nerves not visible. Petiole terete, sometimes canaliculate, usually slightly winged, 10 – 25 × 1 – 2 mm. Stipule not sheathing, broadly flabellate, 5 – 11 × 8 – 10 mm, apex usually broken. Inflorescence a compound cyme, 6 – 12 cm long; peduncle 3.5 – 6 cm long; bracts of first internode of rachis and first branches 2, triangular, flabellate or lanceolate, 3 – 12 × 1 – 3 mm, sometimes with 2 – 3 teeth on the margin; first internode of rachis and first branches 4.5 – 8.5 cm long; second internode of rachis and second branches 2.5 – 4.5 cm long; bracts of capitulum oblong-obovate, 3 – 5 × 2 mm, apex rounded. Pedicel short, 2 – 4 × 0.5 mm. Flowers subsessile, usually 5 in each capitulum, 10 – 12 mm long, hypanthium 1 – 3 × 0.6 – 0.8 mm, calyx tube 0.3 – 1 × 1 – 2.5 mm, lobes 0.3 × 0.4 – 0.5 mm. Corolla cream white or purplish white, tube base narrow, 0.6 – 1.2 mm wide, broadening from midway, apex 3.5 – 4.5 mm wide, corolla lobes triangular, 2.5 × 2 mm. Fruits iridescent blue, ellipsoid, 7 – 8 × 4 – 5.5 mm, with pedicels 2 – 4 mm long. Pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.3 mm wide, curved, 0.3 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.6 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.2 – 0.3 mm wide. Raphal opening at base of the endocarpal outgrowth, narrowly ovoid, 0.5 × 0.2 mm, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.5 – 0.7 × 0.2 – 0.3 mm. PGS not detected. Seed light brown, hemiellipsoid, slightly crested at central part of dorsal side, 0.3 × 4 mm, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE3E47E1877FBDCEA74C0FC.taxon	distribution	Distribution, habitat Borneo: Sabah, Mount Kinabalu (Kinabalu National Park), Lower montane forest, alt. 1100 – 1500 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	description	urn: lsid: ipni. org: names: 77215408 - 1 Figs 16 – 17	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	diagnosis	Diagnosis Differs from other Kuching species (C. lancifolioides T. Y. Yu sp. nov. and C. macrocarpa T. Y. Yu sp. nov.) in having oblanceolate leaf-blades (not lanceolate), sessile inflorescences (peduncle inconspicuous), 4 thin bracts subtending the rachis with 2 longer bracts 10 – 12 × 1 – 3 mm and 2 shorter bracts 3 – 5 × 2 mm, small capitular bracts 5 – 6 × 2 – 6 mm, long corolla tube 10 – 18 mm long.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	etymology	Etymology Based on the unpublished name given to some specimens of ‘ Cephaelis lancifolius ’ by H. N. Ridley.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • Matang; Jan. 1915; H. N. Ridley s. n.; holotype: K [K 001129713]!. Additional material MALAYSIA – Borneo, Sarawak • Kuching; 16 Apr. 1893; G. D. Haviland 2998; K! • Munggu Unjam F. R.; 17 Oct. 1958; F. G. Browne 9663; K!, SING! • Kuching; 28 Feb. 1893; G. D. Haviland 2997; K!.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	description	Description Tall herb to small treelet, 0.9 m tall, apparently unbranched, glabrous. Lower internodes terete, upper internodes usually slightly flattened and canaliculate, internodes (1.5) – 3 – 4.5 cm long. Leaf-blades narrowly elliptic to oblanceolate, 10 – 22 × 2 – 4.5 cm, first pair of leaves at apex sometimes bract-like, very narrow, 1 – 4 cm × 2 – 6 mm; apex acuminate, acumen 1 – 2 cm long, base attenuate, conspicuously decurrent to petioles, midrib slightly raised above, domatia absent; secondary nerves 10 – 16 on each side of the midrib, prominent above; tertiary nerves not visible; margin drying with a continuous light-yellow line from apex to base. Petiole short, compressed, 5 – 20 × 0.8 – 2 mm. Stipule triangular to oblong, 5 – 8 × 3 – 5 mm, apex usually bilobed, sometimes divided to the base into 2 lobes, each lobe 5 – 8 × 2 – 3 mm. Inflorescences 1.5 – 3.5 cm long, subsessile (true peduncle absent or inconspicuous), basal lateral partial peduncles 2, subequal to the main rachis, (appearing as though three terminal inflorescences), short, usually flattened, 5 – 12 × 1 – 1.5 mm; distal partial peduncles absent or short, 0.5 – 0.8 × 1 – 1.5 mm; 5 – 7 × 1 – 2 mm; bracts of rachis 4, triangular to lanceolate, usually sheathing at base, the 2 longer bracts 10 – 12 × 1 – 3 mm, 2 shorter bracts 3 – 5 × 2 mm; capitular bracts 8 – 10, triangular to ovate, 5 – 6 × 2 – 6 mm, outer bracts slightly sheathing at base. Flowers sessile, 8 – 14 in each capitulum, glabrous apart from inside corolla tube. Hypanthium 1.5 – 2 × 1 – 1.5 mm, calyx tube absent, lobes 5, broadly triangular, 0.25 × 1 mm. Corolla white, glabrous 1 – 1.8 cm long in bud, tube slightly broadened at apex, 1 mm wide at base, apex 2.5 – 3 mm wide, band of hairs 2 mm wide, at base of stamens 2.5 – 3 mm from mouth of corolla tube, hairs erect, colourless, 0.1 – 0.2 mm long; corolla lobes 5 triangular, 3 × 1.5 mm. Stamens 3 mm long, slightly concave, base bifurcate, inserted 1 mm from mouth of corolla, 9 mm from base of corolla, filaments very short and broad, 0.2 × 0.2 mm. Style exserted about 2 mm from mouth of corolla, stigma bilobed, lobes orbiculate, 0.7 mm diameter. Disc cylindric, 0.8 × 0.8 mm, apex flat. Fruits sessile, ellipsoid, 8 × 7 × 6 mm, fruit colour in vivo not recorded, calyx persistent, not accrescent, 0.5 × 2 mm, disc persistent, not accrescent, 0.5 × 1.2 mm. Pyrene plano-convex, 7 – 8 × 5.5 – 6.5 × 2 – 3 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.4 mm wide, 0.25 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 1 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.5 mm wide; raphal opening at base of the endocarpal outgrowth, round, 0.4 mm wide, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.8 × 0.2 mm. PGS not detected. Seed light brown, hemi-ellipsoid, 6 × 0.5 mm, longitudinally slightly crested at midline of dorsal surface, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sarawak, Kuching. On undulating, well drained kerangas, alt. 15 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFE4E4431819FAB9ED96C2A1.taxon	discussion	Remarks No PGS was found on the pyrene of this species like other members of the ‘ Involucrate group’. However, in this species, the pyrene splits very easily at the base of the dorsal crest close to the raphal opening. The raphal opening of this species is very small.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	description	urn: lsid: ipni. org: names: 77215409 - 1 Figs 18 – 19	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	diagnosis	Diagnosis Differs from Chassalia lancifolia sp. nov. in having more coriaceous leaves, leaf-blades lanceolate but not oblanceolate; in having a longer peduncle 1 – 6.5 cm × 1.5 – 2.5 mm, while C. lancifolia sp. nov. has a long first internode that resembles a peduncle, but a sessile inflorescence (true peduncle more or less absent); in having the fruit not significantly ridged (0.2 – 0.3 mm high) compared to C. lancifolia sp. nov.; in the fruit ventral side not as deeply concave as C. lancifolia sp. nov.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	etymology	Etymology The epithet reflects the leaf and inflorescence characters that are similar to Chassalia lancifolia sp. nov.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • Kuching, Lundu District, Sematan area; alt. 20 – 50 m; 1 ° 47 ′ N, 109 ° 45 ′ E; 26 Apr. 1996; John H. Beaman 12027; holotype: K [K 001129714]!; isotypes: UNIMAS, IBEC. Additional material MALAYSIA – Borneo, Sarawak • Kuching, Santubong, Telok Pasir; alt. 100 m; 15 Jun. 1964; Banying & Sibat S 21547; K!, SAR.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	description	Description Shrub to small tree, height not stated, but likely to be more than 40 cm tall, glabrous. Internodes short, 1 – 2.5 cm × 2 – 4 mm, lower internodes terete, upper internodes drying slightly compressed and shorter. Leaf-blades narrowly lanceolate, 13.5 – 29 × 1.5 – 3.5 cm, margin slightly sinuous when dry, a light yellow line visible very near to margin from apex to base; apex acuminate, acumen 1 – 2 cm, base attenuate, conspicuously decurrent to petioles, midrib slightly raised above, domatia absent; secondary nerves 12 – 16 on each side of the midrib, prominent above; tertiary nerves not visible. Petiole with a narrow wing on each side, very short, 10 – 15 × 1 – 1.5 mm. Stipule triangular to oblong, 5 × 4 – 5 mm, sometimes when old the chaffy part broken and divided into 2. Inflorescences compound cymes, 2 – 9.5 cm long. Peduncle longitudinally minutely striate, apex slightly compressed, 1 – 6.5 cm × 1.5 – 2.5 mm, rachis and first branches 5 – 10 × 1 – 1.5 mm, second internode of rachis and second branches absent or very short, 4 – 5 × 1.5 – 2 mm. Bracts of second internode of rachis and second branches 4, elliptic, 5 × 1 – 2 mm, bracts of capitulum 2, ovate, slightly broader than bracts of partial peduncle, 3 – 5 × 2 – 3 mm. Flowers not seen. Hypanthium and calyx tube obovoid, 1.5 × 1 – 1.5 mm, calyx lobes 1.25 × 0.7 – 1 mm. Fruits shiny green, prolate, 7 × 5 – 6 mm, pedicel short, around 1 mm long. Pyrenes plano-convex, compressed, 7 × 6 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.25 mm wide, 0.15 mm apart along their length, 0.2 – 0.3 mm high, forming a longitudinal groove from apex to base between the two crests; ventral surface slightly concave, centrally slightly elevated, margin with an endocarpal outgrowth 0.5 – 0.8 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.25 mm wide. Raphal opening at base of the endocarpal outgrowth, large, round to trullate, 0.5 mm wide or 1.5 mm × 0.5 mm if trullate, 0.3 – 0.4 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 1 × 0.3 mm. PGS not detected. Seed light brown, hemi-ellipsoid, slightly crested at central part of dorsal side, 6 × 0.5 mm, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	distribution	Distribution, habitat Borneo: Malaysia, Kuching, around Lundu. Kerangas forest, alt. 20 – 50 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD9E4421870F965EB91C3C6.taxon	discussion	Remarks The pyrenes of both this species and Chassalia lancifolia sp. nov. can be very easily separated into two parts between the raphal opening and the base of dorsal groove between the two crests.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDDE4441816FEA0EE36C55A.taxon	description	urn: lsid: ipni. org: names: 77215410 - 1 Figs 20 – 21	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDDE4441816FEA0EE36C55A.taxon	diagnosis	Diagnosis Differs from all other species of Chassalia in having a peduncle up to 10 cm long and inflorescence usually longer than the longest leaf; in the inflorescence usually having 3 branches with each branch bearing a single capitulum.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDDE4441816FEA0EE36C55A.taxon	etymology	Etymology The chosen epithet reflects the relatively long peduncle, rachis and branches of inflorescence.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDDE4441816FEA0EE36C55A.taxon	materials_examined	Type MALAYSIA – Borneo, Sabah • Ranau District, Mount Kinabalu, Summit Trail at Pondok Ubah; 6 ° 03 ′ N, 116 ° 33 ′ E; alt. 2100 m; 9 May 1995; Teofila E. Beaman 275; holotype: K [K 001129716]!. Additional material MALAYSIA – Borneo, Sabah • Penampang, Sunsuron, Path to kg. Longkogungan, Km 51; SAN 121756; K! • Ranau, Kinabalu National Park; 5 ° 59 ′ 65 ″ N, 116 ° 31 ′ 82 ″ E; alt. 1971 m; SAN 148497; K! • Ranau district, East Mesilau River near Mesilau Cave; 6 ° 03 ′ N, 116 ° 36 ′ W; alt. 1700 – 1950 m; John H. Beaman 10681; K!.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDDE4441816FEA0EE36C55A.taxon	description	Description Shrub, 1 m tall, glabrous. Stems terete. Internodes of the flowering branch (1.5 –) 2 – 4.5 (– 6.5) cm × 2 – 3 mm, flowering internode usually reduced, 0.5 – 1.7 cm long. Leaf-blades narrowly elliptic to oblanceolate, sometimes narrowly rhombic, (6 –) 8 – 12.5 (– 13.5) × 2.2 – 3.8 cm, margin entire, apex acute to acuminate, acumen 5 – 10 mm long; base cuneate; midrib slightly raised above, domatia absent; secondary nerves 6 – 9 on each side of the midrib, prominent above; tertiary nerves not visible. Petiole flattened, canaliculate, (3 –) 8 – 15 × 1 mm. Stipule not sheathing, oblong-elliptic, 3 – 7 × 4 – 6 mm. Inflorescences compound cymose, 11.5 – 16 cm long; peduncle terete, 4.5 – 8.5 (– 10) cm long; partial peduncle 2 – 7 cm long; central partial peduncle sometimes with rachis and tertiary branches, rachis 6 cm long; tertiary branches of rachis cymose, 1 – 1.3 cm long; bract of tertiary branches 8 – 10 × 4 mm. Bracts of peduncle and partial peduncle 2, opposite, sheathing at base, sheath 1 – 3 mm, apex triangular to ensiform, 6 – 10 × 0.5 – 2.5 mm, slightly denticulate at apex with 3 – 6 teeth on each side or entire, teeth 0.2 mm long. Bracts of each capitulum 6 – 10, outer bracts ovate to elliptic, 5 – 6 × 2 – 3 mm, inner bracts smaller, elliptic to lanceolate, 5 – 6 × 0.8 – 1 mm. Flowers capitate, sessile in terminal clusters, pedicel absent. Hypanthium obovoid, glabrous, 2 – 3 mm long; calyx 5 - lobed with each lobe broadly triangular, 0.5 × 1 mm. Corolla cream white, tube 7 – 8 mm long, broadening from midway to top, lower part 1.5 mm wide, apex 5 mm wide; lobes triangular, 3.5 – 4 × 3 – 4 mm, apex acute or apiculate. Fruits shimmering blue, ellipsoid, (1 –) 7 – 9 on each capitulum, 7 – 8 × 4 – 6 mm. Disc 0.5 × 1 mm. Pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.5 × 0.2 – 0.3 mm, curved, slightly grooved longitudinally from apex to base between the two crests; ventral surface concave, centrally slightly elevated, margin with an endocarpal outgrowth 0.2 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.1 mm long, 0.5 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.8 × 0.1 mm. PGS not detected. Seed brown, hemi-ellipsoid, slightly crested at central part of dorsal side, 4 × 1 mm, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDDE4441816FEA0EE36C55A.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sabah, Ranau; Mount Kinabalu; Penampang. Lower montane forest, alt. 1970 – 2100 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDEE4441868FE1BEA47C3C6.taxon	description	urn: lsid: ipni. org: names: 77215411 - 1 Figs 22 – 23	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDEE4441868FE1BEA47C3C6.taxon	diagnosis	Diagnosis Differs from all other Bornean species of Chassalia in having relatively large fruits (10 – 12 × 10 × 5 mm); differs from other species of Chassalia from Mt Matang in having larger rachis and capitulum bracts, rachis bracts usually round or acuminate with long acumen which covers the flower buds, and in fruits becoming pale yellowish brown when dry.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDEE4441868FE1BEA47C3C6.taxon	etymology	Etymology The epithet was chosen because, within Borneo, this species of Chassalia has large fruits (1.2 × 1 × 0.5 cm).	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDEE4441868FE1BEA47C3C6.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • 1 st Division, Kuching, Matang, Path to Bukit Tanduk; alt. 750 m; 23 Apr. 1987; Bernard Lee Meng Hock S 54027; holotype: K [K 001129715]!; isotype: SAN. Additional material MALAYSIA – Borneo, Sarawak • 1 st Division, Kuching, Matang, by trail; alt. 450 m; 27 Oct. 1929; M. & J. Clemens 22373; K!, SAR • 28 Oct. 1929; M. & J. Clemens 22373; K!, SAR • alt. 500 m; 31 Jul. 1963; Paul Chai S 18534; A, K!, L, SAN, SAR • Feb. 1915; H. N. Ridley s. n.; K!.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDEE4441868FE1BEA47C3C6.taxon	description	Description Shrub, 1 – 1.5 m tall, glabrous. Internodes (1 –) 1.5 – 4.5 cm × 3 – 4 mm, lower internodes terete, upper internode usually drying flattened, canaliculate, broadening at apex. Leaf-blades narrowly elliptic to narrowly lanceolate, 15 – 24 × 2 – 5.5 cm, margin entire, apex acute to acuminate, base cuneate; midrib slightly raised above, domatia absent; secondary nerves 12 – 16 on each side of the midrib, prominent above; tertiary nerves not visible. Petiole very short, canaliculate, usually slightly winged, 10 – 25 × 1 – 2 mm. Stipule not sheathing, broadly flabellate, 1 – 2 × 1 – 1.5 cm, apex usually broken. Inflorescence a compound cyme, (1 –) 1.8 – 5 cm long; peduncle (0.5 –) 1.5 – 3.5 cm long; Bracts of second internode of rachis and second branches 2, round to elliptic, 1.2 × 1 cm, usually slightly sheathing at base, apex obtuse, sometimes acuminate with acumen 5 mm long, second branches usually very short to absent, bracts of capitulum elliptic, 10 – 12 × 5 – 10 mm. Open flowers not seen. Fruits purplish blue when young, blue when ripe, light yellowish brown when dry, obovoid, 10 – 12 × 10 × 5 mm. Pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.3 mm wide, curved, 0.3 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, centre slightly elevated, margin with an endocarpal outgrowth 0.5 – 0.8 mm wide and a groove between the edge of endocarp and endocarpal outgrowth 0.3 – 0.5 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.2 – 0.3 mm diameter, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, flabellate, erect, 1.5 × 0.3 × 0.6 – 0.7 mm. PGS not detected. Seed not seen.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFDEE4441868FE1BEA47C3C6.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sarawak, 1 st Division, Kuching, Matang. Mixed dipterocarp forest, alt. 450 – 750 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD3E44E181DFEA0EC27C559.taxon	description	urn: lsid: ipni. org: names: 77215412 - 1 Figs 24 – 25	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD3E44E181DFEA0EC27C559.taxon	diagnosis	Diagnosis Differs from other Bornean species of Chassalia by having secondary nerves densely distributed, 16 – 18 on each side of the midrib; stipule broadly flabellate, 5 – 8 × 5 – 12 mm; inflorescence 9.5 – 14 cm long, longer than the average leaf, but usually shorter than the longest leaf; only found in Gunung Mulu National Park.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD3E44E181DFEA0EC27C559.taxon	etymology	Etymology The epithet alludes to Gunung Mulu National Park to which this species is endemic.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD3E44E181DFEA0EC27C559.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • Gunung Mulu National Park, west ridge just below Camp 4; 4 ° 03 ′ N, 114 ° 53 ′ E; alt. 1600 m; submontane ridge forest; 29 Apr. 1978; fl.; G. Argent, B. Coppins 1134; holotype: K [K 001129717]!; isotype: KEP [KEP 271647]. Additional material MALAYSIA – Borneo, Sarawak • Gunong Mulu National Park, ridge west of Camp 4; 4 ° 05 ′ N, 114 ° 55 ′ E; alt. 1850 m; 25 Mar. 1978; fl.; I. Nielsen 856; K!, AAU • Camp 4; 114 ° 54 ′ E, 4 ° 05 ′ N; alt. 1800 m; slope in moss forest in upper montane forest; 22 Mar. 1978; fl.; Carlo Hansen 544; K!.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD3E44E181DFEA0EC27C559.taxon	description	Description Subshrub, shrub or sub-woody epiphyte, 0.75 – 2 m high, glabrous. Stem terete, 3 – 4 mm wide. Internodes of the flowering branch 1 – 3 cm long, lower internode terete, upper internode usually drying flattened, canaliculate, broadening at apex, base 2 – 4 mm wide, apex 3 – 5 mm wide. Leaves opposite, decussate. Leaf-blades elliptic, 6.5 – 14.5 × 3 – 5.8 cm; apex acute to acuminate, acumen 5 – 15 mm long; base attenuate; midrib slightly raised above, domatia absent; secondary nerves 16 – 18 on each side of the midrib, prominent above; tertiary nerves not visible. Petiole flattened, canaliculate, 3 – 4 cm × 1 – 2 mm. Stipule not sheathing, flabellate, 5 – 8 × 5 – 12 mm, apex breaking very easily, base drying deep brown, margin light brown. Inflorescence a compound cyme, 9.5 – 14 cm long, peduncle 6.5 – 8 cm long, bracts of first internode of rachis narrowly elliptic, 2 – 4, 9 – 12 × 3 – 6 mm, first internode of rachis and first branches 1.5 – 3 cm long, bracts of second internode of rachis and second branches 4, ovate to elliptic, 10 × 5 mm, bracts of capitulum 5 – 6, narrowly elliptic, 5 – 10 × 2 – 5 mm, second internode of rachis and second branches 5 – 10 mm long or absent. Flowers 12 – 18 in each capitulum, hypanthium 2 × 2 – 3 mm, calyx tube 1 – 1.2 × 1.5 mm, lobes of calyx tube 0.3 × 0.3 – 0.5 mm, corolla tube 8 – 12 × 3 – 4 mm, inside corolla tube a band of hairs 0.5 mm wide at base of stamens, 3 mm from mouth of corolla tube, hairs erect, colourless, 0.1 – 0.2 mm long; corolla lobes 2 × 2 – 3 mm, stamens 2.5 × 0.5 mm, filament 0.5 × 0.1 mm, style ca 1.5 times as long as corolla, 1.8 cm long. Disc cylindric, 0.7 × 0.9 mm. Fruits ellipsoid, dark purple when ripe, 7.5 – 8 × 4 – 5.5 × 4 – 5.5 mm, pyrenes plano-convex, dorsal surface convex, with two adjacent parallel longitudinal crests, each 0.2 mm wide, curved, 0.2 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, centre slightly elevated, margin with an endocarpal outgrowth 0.4 – 0.5 mm wide and a groove between the edge of endocarp and endocarpal outgrowth 0.2 – 0.3 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.3 mm diameter, 0.2 mm from the edge of the pyrene wall, apex with a bony spine, erect, 1 × 0.2 mm. PGS not detected. Seeds brown, hemi-ellipsoid, slightly crested at central part of dorsal side, 3.2 × 0.6 mm.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD3E44E181DFEA0EC27C559.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sarawak, Gunung Mulu National Park, around Camp 4. Slope in moss forest in upper sub-montane to montane forest, alt. 1600 – 1850 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD4E453181CFE1BEDACC644.taxon	description	urn: lsid: ipni. org: names: 77215413 - 1 Figs 26 – 27	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD4E453181CFE1BEDACC644.taxon	diagnosis	Diagnosis This is the smallest of all Bornean species of Chassalia, differing from all other species in being just 25 – 30 cm tall (other species are at least 40 cm tall, and usually a minimum of 1 m tall), in the obovate leaves just 5.5 – 7.5 cm long (in other species they exceed 10 cm long and may attain 48 cm long), in the apex of leaves obtuse (acute or acuminate in most other species), in having large white fruits 8 × 7 × 7 mm (all other species have blue or purple or black fruits), in having a large bony spine 2 × 1 × 0.5 mm on the ventral surface of the pyrene.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD4E453181CFE1BEDACC644.taxon	etymology	Etymology The epithet alludes to summit moss forest where it has been collected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD4E453181CFE1BEDACC644.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • 1 st Div., Simunjan, Serian / S’ggang Rd., Gunong Gaharu 70 th Mile; alt. 800 m; 8 Oct. 1974; Ilias & Azahari S 35671; holotype: K [K 001129718]!; isotypes: L, KEP, SAR. Additional material MALAYSIA – Borneo, Sarawak • 2 nd Div., Gunong Aping; alt. 900 m; 13 Jul. 1961; S. Collenette 742; K!, SAN.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD4E453181CFE1BEDACC644.taxon	description	Description Herb, 25 – 30 cm tall, glabrous, almost half of the plant growing among mosses. Stem 1 – 2 mm wide, usually producing adventitious roots 1 – 8 cm below lowest internode, internodes 1.8 – 3.5 cm long, lower internodes terete, upper internodes drying flat, slightly canaliculate. Leaf-blades narrowly obovate to oblanceolate, coriaceous, adaxially dark green, abaxially light yellowish-green, (2.5 –) 4 – 6.5 × 1.3 – 1.8 cm; apex obtuse, base attenuate; midrib slightly raised both adaxially and abaxially, secondary nerves 7 – 12 on each side, tertiary nerves not visible; petiole short, 5 – 10 mm long. Stipule flabellate, 5 – 7 × 4 – 5 mm. Inflorescences short, 4.5 cm long, peduncle 3.5 cm × 0.8 mm, broadening near apex to 2 mm wide, bracts of first internode of rachis and first branches 4, broadly elliptic, 4.5 × 2 – 3.5 mm; first internode of rachis and first branches very short to absent, usually less than 1 mm; bracts of capitulum 4 – 6 or more, 4 – 4.5 × 1 – 4.5 mm, with crystal bodies on each rachis bract and capitulum bract. Flowers 6 – 12 in each capitulum, open flowers not seen; hypanthium 1.5 – 2 mm long, calyx tube 0.7 mm long, apex slightly curved. Corolla white, glabrous, 1 – 1.8 cm long in bud, tube slightly broadened at apex, 5 mm long before opening, 1 mm wide at base, apex 2.5 – 3 mm wide, band of hairs 1 mm wide, at base of stamens 1 – 2 mm from mouth of corolla tube, hairs erect, colourless, 0.1 – 0.2 mm long; open flower not seen. Stamens 1 × 0.5 mm, slightly concave, base bifurcate, inserted ca 1.5 mm from mouth of corolla, filaments very short to absent. Stigma bilobed, lobes orbiculate, 0.6 mm diameter. Disc cylindric, 0.4 mm long, 0.7 mm wide, apex flat. Fruits sessile, ellipsoid, 7 – 8 × 7 × 7 mm, pure white; calyx persistent, not accrescent, 1 × 2 mm, disc persistent, not accrescent, 0.5 × 1 mm. Pyrenes plano-convex, 7 – 8 × 6 – 7 × 4 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 1 mm wide, 1 mm high, 0.5 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.2 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.2 mm wide. Raphal opening at base of the endocarpal outgrowth, round, 0.5 mm wide, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, flabellate, 2 × 1 × 0.5 mm. PGS not detected. Seed light brown, hemi-ellipsoid, 6 × 0.5 mm, longitudinally slightly crested at midline of dorsal surface, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFD4E453181CFE1BEDACC644.taxon	distribution	Distribution, habitat Borneo: Malaysia, Sarawak, Gunung Gaharu (1 st Division) and Gunung Aping (2 nd Division), summit of mountain, moss forest, alt. 800 – 900 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	description	urn: lsid: ipni. org: names: 77215414 - 1 Figs 28 – 29	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	diagnosis	Diagnosis Differs from Chassalia blumeana Govaerts to which it is most similar, by having inflorescence branches and rachis Ẑ 5 mm, usually 1 – 5 cm long, bracts of inflorescence branches and rachis usually consist of 2 leaf-like bracts and 2 stipule-like bracts, leaf-like bracts sometimes develop to 3 – 7 cm long.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	etymology	Etymology Named for Marianne North (1830 – 1890), who included this plant in painting 624 entitled Curious Plants from the Forest of Matang, Sarawak, Borneo (https: // images. kew. org / botanical-art / mariannenorth / 624 - curious-plants-forest-matang-sarawak- 5122480. html) which is the first image record of this species, made in the 1860 s. It is possibly the earliest record of the genus from Borneo.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	materials_examined	Type MALAYSIA – Borneo, Sarawak • First Division, Kuching, Matang, proposed Matang National Park, Sungai Sendok; 8 May 1987; Bernard Lee Meng Hock S 53828; holotype: K [K 001129725]!; isotype: SAR. Additional material MALAYSIA – Borneo, Sabah • Ranau, Mininsalu; 22 Sep. 1988; Amin & Prancis SAN 123432; K, SAN. – Borneo, Sarawak • Sg. Rayu, Matang Forest Reserve; 27 Mar. 1988; Munting & Jugah, S 55620; K!, SAR • 5 th Division, along Sg. Maisa in Maligan Range, Lawas; alt. 3400 ft; 13 Mar. 1973; Ilias Paie S 32900; K!, SAR • Sri Aman Division, Temawai Berau, Sungai Selepong; 6 Apr. 1990; Rena, Runi, Rantai et al. S 58511; K!, SAR.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	description	Description Herb, shrub to small tree, 1 – 2 m tall, glabrous. Stem terete, young parts of stems slightly flattened and canaliculate when dry, internode 3 – 8 cm × 2 – 4 mm. Leaf-blades obovate to elliptic, usually broadest at ¼ to ½ length from apex, 12 – 27 × 4 – 9 cm, apex acuminate with acumen 1 – 1.5 (– 3) cm long, base truncate, midrib slightly raised above from both adaxial and abaxial, secondary nerves 8 – 14 on each side of the midrib, petioles 1 – 6 cm long. Stipule flabellate, margin usually broken, sometimes slightly bilobed or incised, 8 – 14 × 5 – 14 mm, with standard colleters inside. Inflorescence compound cyme, terminal, usually with rachis and 2 branches, 6 – 14 cm long in total. Peduncle 4 – 7.5 cm long, branches and first internode of rachis 1 – 4 cm long, branches usually 0.5 – 1 cm shorter than rachis, bracts of branches and first internode of rachis usually 4, separate or sheathed at base, 2 leaf-like bracts 1 – 1.8 cm × 1.5 – 2 mm, sometimes growing larger than young but not fully developed leaves 3 – 7 × 1.5 – 2 cm, 2 stipule-like bracts 5 – 8 × 5 – 8 mm, rachis and branches sometimes with second branches and second internode of rachis 2 – 10 mm long, capitular bracts 8 – 10 × 2 – 5 mm. Flowers sessile, 15 – 18 mm long, corolla tube lower part 0.6 – 1 mm wide, upper part 2 – 2.5 mm wide, mouth 3.5 – 4 mm wide, corolla lobes usually 5, 3 × 2.5 mm, stamens 2.3 – 2.5 mm long, inserted 1 mm from corolla mouth, inside corolla tube a band of hairs 0.7 mm long at base of stamens, hairs erect, colourless, 0.1 – 0.2 mm long; stigma bilobed, each lobe round, 0.5 mm in diameter; disc 1.2 × 1.2 mm. Hypanthium 4 × 2 mm, calyx tube 1 × 4 mm with 5 lobes 0.1 × 0.5 mm. Fruit black or deep brown when dry, blue when ripe, ellipsoid to round, 7 × 6 × 6 mm, calyx persistent, not accrescent, 0.5 × 2 mm, disc persistent, not accrescent, 1.2 × 1.2 mm. Pyrene plano-convex, 7 × 5.5 – 6 × 2 – 3 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.4 mm wide, 0.25 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 1 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.5 mm wide; raphal opening at base of the endocarpal outgrowth, round, 0.4 mm wide, 0.2 – 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 0.8 × 0.2 mm. PGS not detected. Seed light brown, hemi-ellipsoid, 5 × 6 mm, longitudinally slightly crested at midline of dorsal surface, endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	distribution	Distribution, habitat Borneo: Malaysia, from central Sabah to west Sarawak. Alluvial forest, stream banks, Kerangas forest. Lowland to montane forest, alt. 200 – 1000 m.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFC9E450181FFD01EB43C070.taxon	discussion	Remarks This species is one of the most widespread of the Bornean ‘ involucrate’ species.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCAE4571BA7FB34EE72C1CD.taxon	materials_examined	Replaced synonym: Cephaelis psychotrioides Valeton, Icones Bogorienses 4 (3): t. 357 (Valeton 1913 b). – Chassalia psychotrioides (Valeton) I. M. Turner, Feddes Repertorium 139: 399 (Turner 2019), nom. illegit., non Chassalia psychotrioides DC., Prodromus Systematis Naturalis Regni Vegetabilis 4: 531 (1830) (Candolle 1830). – Type: INDONESIA • Borneo, Liang Gagang; 1893 – 1894; Hallier 2703; hololectotype: BO [BO- 1374040], designated by Turner (2019: 399); isolectotype: BO [BO- 1374039]. Additional material MALAYSIA – Borneo, Sarawak • Serian, Gunong Penrissen; 2 May 1962; Ilias Paie S 16336; K!, L, SAR • Serian, Tebedu, Bukit Simurus; 12 Feb. 1985; Abg. Mohtar S 49281; K!, SAR • 2 nd Division, Lubok Antu District, Lanjak-Entimau P. F., Sg. Jelok, near Bukit engkajang; 18 Mar. 1974; Paul Chai S 34024; K!, L, KEP, MO, SAN, SAR • INDONESIA • Borneo, Jaro Dsm, 10 km NE of Muara Uya, Kalimantan Selatan; alt. 90 m; 16 Nov. 1971; Kuswata Kartawinata 828; K!, L.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCAE4571BA7FB34EE72C1CD.taxon	description	Description Shrub to small tree, 1 – 1.5 m tall. Stem terete, central part slightly canaliculate when dry, hairy from the first or second internode from apex. Internodes 1.5 – 8 cm × 4 mm. Leaf-blades obovate to elliptic, 20.5 – 28.5 × 5.5 – 8 cm, apex acute to acuminate, base truncate, adaxial surface glabrous, abaxial surface hairy, midrib slightly raised on both sides, densely hairy abaxially, petiole 2 – 5.5 cm long, young petiole hairy, glabrescent. Stipule flabellate, apex usually broken, 3 – 8 × 5 – 10 mm, slightly hairy when young. Inflorescence a compound cyme, 7 cm long, all parts hairy except fruits; peduncle 4 cm long, bracts of peduncle stipule-like, 1 × 5 mm, first branches and first internode of rachis 2 – 2.5 cm long, bracts of first branches and first internode of rachis 2, 4 – 6 × 1 – 2 mm, second branches and second internode of rachis 3.1 cm long, bracts of second branches and second internode of rachis 2, slightly smaller than bract of first branches and first internode of rachis, 2 × 2 mm, bracts of capitulum 2 – 3 × 2 mm. Flowers not seen. Fruits 8 – 10 × 4 – 9 × 4 – 6 mm, blackish brown when dry, calyx persistent, not accrescent, 0.4 × 2 mm, disc persistent, not accrescent, 0.5 × 1 mm. Pyrenes plano-convex, 8 – 9 × 4 – 9 × 4 – 6 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.5 mm wide, 0.25 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 1 – 1.2 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.5 mm wide. Raphal opening, bony spine, PGS, seed and endosperm not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCAE4571BA7FB34EE72C1CD.taxon	distribution	Distribution Borneo: West Kalimantan, Bukit Liang; Sarawak, First Division, Serian, Gunung Penrissen.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCAE4571BA7FB34EE72C1CD.taxon	discussion	Remarks Turner (2019) transferred Cephaelis psychotrioides Valeton to Chassalia. The resultant new combination was illegitimate, being a later homonym of Chassalia psychotrioides DC., a species from Mauritius. Therefore a nomen novum is here published for Valeton’s name for the Bornean species. Valeton’s type specimen Hallier 2703 (BO- 1374040) has a hairy infructescence. Additional information provided by the drawing included in the original publication of this species also shows that it has hairy petioles and abaxial leaf midribs (Valeton 1913 b). The species differs from other Asian species of Chassalia by having a hairy petiole, lower midrib and secondary nerves of the leaves, also the stem apices and inflorescences are densely pubescent. Chassalia psychotriformis is restricted to a region straddling the Sarawak-Kalimantan border in Borneo based on specimen records from K and other herbaria. The most distinctive vegetative character of C. psychotriformis is the pubescent abaxial surface of the leaves and the pubescent peduncles. It is the only species that has been found with a hairy peduncle among all Asian species of Chassalia. Therefore, the identification of C. psychotriformis is not difficult compared to that of most other Bornean species of Chassalia.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCDE454180CF98AECD8C22E.taxon	description	urn: lsid: ipni. org: names: 77215415 - 1 Figs 30 – 31	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCDE454180CF98AECD8C22E.taxon	diagnosis	Diagnosis Differs from other Bornean species of Chassalia by the stems usually dividing terminally into two flowering branches, also in the highly contracted inflorescence rachis and first branches which are less than 0.5 mm long or less, each inflorescence comprising a single capitulum.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCDE454180CF98AECD8C22E.taxon	etymology	Etymology The epithet reflects the high level of branching in this species, making its gestalt distinctive compared with other species of Chassalia in Borneo.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCDE454180CF98AECD8C22E.taxon	materials_examined	Type MALAYSIA – Borneo, Sabah • Ranau District, Kalangaan Ridge just above Liwagu River; 6 ° 00 ′ 40 ″ N, 116 ° 33 ′ 00 ″ E; alt. 1500 m; 3 May 1995; John H. Beaman 11533; holotype: K [K 001129726]!; isotypes: UNIMAS, IBEC. Additional material MALAYSIA – Borneo, Sabah • Ranau District, Taman Kinabalu, side of Silau trail; 17 Jan. 1987; Amin et al. SAN 117332; K!, SAN • Mount Kinabalu, Bukit Burung Trail near Park Headquarters; 6 ° 00 ′ N, 116 ° 32 ′ E; alt. 1500 m; 3 May 1995; Teofila E. Beaman 252; K!, UNIMAS, IBEC • Mount Kinabalu, lower Siau-silau trail near Park Headquarters; 6 ° 00 ′ 30 ″ N, 116 ° 32 ′ 40 ″ E; alt. 1500 m; 24 Mar. 1995; John H. Beaman 11400; K!, UNIMAS, IBEC • Tambunan District, Crocker Range, Km 59.5 on Kota Kinabalu – Tanbunan Road; 5 ° 06 ′ N, 116 ° 21 ′ W; alt. 1400 m; John H. Beaman 7343; K!, MSC, UKMS.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCDE454180CF98AECD8C22E.taxon	description	Description Shrub, 1 – 1.5 m tall, glabrous. Stems terete, slightly hollowed or not hollowed, usually bifurcating terminally, with each branch producing an inflorescence, internodes on old branches 3 – 5 cm, internode on flowering shoot 1 – 6.5 cm × 1 – 2.5 mm, sometimes slightly canaliculate. Leaf-blades elliptic to oblanceolate, 10 – 15 × 3 – 4.5 cm, apex acuminate, acumen 1.5 – 2 cm, base truncate; midrib slightly raised from both adaxial and abaxial, secondary nerves 10 – 12 on each side of the midrib, petiole 1 – 4 cm long. Stipule flabellate, old stipules 1 × 0.6 – 1 cm. Inflorescence terminal, capitula condensed into one head, peduncle 1.5 – 3 cm, rachis and first branches less than 0.5 mm or absent, bracts of rachis and first branches 2, elliptic to narrowly lanceolate, 13 – 18 × 1 – 1.5 (– 5) mm, bracts of each capitulum lanceolate, 10 × 3 – 5 mm. Flower not seen. Fruits dark green to bluish black, 5 – 7 in each capitulum, ellipsoid, 6 – 7 × 5.5 – 6 × 4.5 – 5 mm, pedicel 3 × 0.5 mm, calyx persistent, not accrescent, 0.5 × 1.3 mm, disc persistent, not accrescent, 0.2 × 0.6 mm. Pyrene plano-convex, 6 – 7 × 5.5 – 6 × 2.5 – 3 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.3 mm wide, 0.2 mm apart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 0.4 – 0.5 mm wide, with a groove between the edge of endocarp and endocarpal outgrowth 0.1 mm wide; raphal opening at base of the endocarpal outgrowth, round, 0.4 mm wide, 0.3 mm from the edge of the pyrene wall, apex with a bony spine, spine triangular, erect, 1 × 0.1 mm. PGS not detected. Seed not detected.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
355087D8FFCDE454180CF98AECD8C22E.taxon	distribution	Distribution, habitat Borneo: Malaysia, Ranau District and Tambunan District, around Mount Kinabalu, Crocker Formation and Trusmadi Formation; lower montane forest, at 1400 – 1500 m a. s. l.	en	Yu, Tian Yi, Turner, Ian M., Cheek, Martin (2021): Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species. European Journal of Taxonomy 738: 1-60, DOI: 10.5852/ejt.2021.738.1261, URL: http://dx.doi.org/10.5852/ejt.2021.738.1261
