identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
2BCA64EFA8135D7797AD83B236A8591D.text	2BCA64EFA8135D7797AD83B236A8591D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Ranunculus jiguanshanicus W. Q. Fei, Q. Yuan & Q. E. Yang 2023	<div><p>Ranunculus jiguanshanicus W.Q.Fei, Q.Yuan &amp; Q.E.Yang sp. nov.</p><p>Figs 1, 2, 3, 4, 5</p><p>Diagnosis.</p><p>Ranunculus jiguanshanicus is readily distinguishable from all other Chinese species of Ranunculus by a unique array of characters, including small stature, glabrous and prostrate stems, 3-foliolate leaves with obvious petiolules (3-5 mm long), unequally 3-sected leaflets, lanceolate to linear ultimate leaflet segments, small flowers (5.2-6 mm in diameter), and long styles in the carpels and achenes (ca. 0.8 mm long).</p><p>Type.</p><p>China. Sichuan province: Chongzhou, Anzihe Nature Reserve, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.17275&amp;materialsCitation.latitude=30.768278" title="Search Plazi for locations around (long 103.17275/lat 30.768278)">Jiguan Shan</a>, 30°46'5.8"N, 103°10'21.93"E, alt. 2998 m, among moss on rocks or rocky cliffs in moist places in fir forests, 10 June 2022, W.Q. Fei 581 (holotype: IBSC; isotypes: IBSC, PE) .</p><p>Description.</p><p>Herbs perennial, terrestrial or rupicolous. Roots 2-5, 6-10 cm long, fibrous, slender, slightly thickened at base. Stems 7-15 cm long, prostrate, glabrous, unbranched to few-branched. Basal leaves 2-5, 3-foliolate, long-petiolate; petioles 2-4 cm long, glabrous; blades 0.8-1 × 0.8-1.3 cm, suborbicular, thinly chartaceous, adaxially green, abaxially light green, both sides glabrous; leaflets 3, unequally 3-sected, petiolulate, petiolules 3-5 mm long, ultimate leaflet segments 3-4 × 0.8-1.2 mm, narrowly lanceolate to linear, margin entire, apex 1-2-denticulate to 1-2-cleft. Lower cauline leaves 2-3, similar to basal ones but smaller. Upper cauline leaves 1-2, 3-foliolate, subsessile or sessile, adaxially glabrous or sparsely puberulous, abaxially glabrous, central leaflet 4.5-5 × 1-1.2 mm, narrowly lanceolate to linear, margin entire, lateral leaflets entire, 1-2-lobate or 2-3-sected, ultimate leaflet segments 3-3.5 × 1-1.2 mm, narrowly lanceolate to linear. Inflorescences terminal, 1(-2)-flowered. Flowers 5.2-6 mm in diameter; pedicels 1-2 cm long, glabrous or sparsely puberulous; receptacles ca. 1.2 mm long, clavate, glabrous; sepals 5, 2.2-2.5 × 1.5-1.8 mm, elliptic to obovate, patent, green tinged with yellowish, concave, both sides glabrous; petals 5(-6), 3.2-3.5 × 1.8-2 mm, obovate, yellow, glabrous, apex rounded, nectary pit without a scale, claws ca. 0.4 mm long; stamens 6-8, ca. 2 mm long, filaments ca. 1.5 mm long, narrowly linear, anthers ca. 0.5 mm long, oblong; gynoecium subglobose; carpels 8-12, ovaries ca. 0.8 × 0.6 mm, ovoid, laterally flattened, biconvex, glabrous, styles ca. 0.8 mm long, glabrous, apex recurved. Aggregate fruit ca. 4 × 4.2 mm, subglobose; achenes ca. 1.2 × 1 mm, widely ovoid, laterally flattened, biconvex, glabrous, styles ca. 0.8 mm long, persistent, glabrous, apex recurved.</p><p>Etymology.</p><p>The specific epithet refers to the type locality of the new species, i.e. Jiguan Shan in the Anzihe Nature Reserve in Chongzhou, Sichuan province, China.</p><p>Phenology.</p><p>Flowering in early June; fruiting at the end of June.</p><p>Distribution and habitat.</p><p>Ranunculus jiguanshanicus is currently known from its type locality, i.e., Jiguan Shan in the Anzihe Nature Reserve in Chongzhou, and from the closely adjacent Xiling Xue Shan in Dayi, both in Sichuan province, China (Fig. 6). It grows among moss on rocks or rocky cliffs in moist places in fir forests at altitudes of 2900-3150 m above sea level.</p><p>Conservation status.</p><p>Ranunculus jiguanshanicus is currently known only from two populations in Sichuan province, China. The Chongzhou population consists of ca. 150 individuals within an area of less than 10 m2. The size of the Dayi population remains unknown. The conservation status of R. jiguanshanicus should better be categorized as "Data Deficient (DD)" before adequate information of this species is acquired (IUCN Standards and Petitions Committee 2022).</p><p>Discussion.</p><p>Ranunculus jiguanshanicus is readily assigned to R. sect. Ranunculus due to its swollen achenes with a distinct beak and receptacles hardly enlarged after anthesis. In his infrageneric classification of the Chinese Ranunculus, Wang (1995a, b) placed almost all the alpine species within this section under the name R. sect. Auricomus (Spach) Schur.</p><p>Morphologically, Ranunculus jiguanshanicus is somewhat similar to R. pegaeus (Figs 7 - 10), also a member of R. sect. Ranunculus, in having prostrate and glabrous stems (Figs 2A, B, 8A, B), small flowers (Figs 3D, 9D), subglobose aggregate fruit (Figs 3I, 9I), and glabrous carpels (Figs 3H, 9H), achenes (Figs 3G, 9G) and receptacles (Figs 3K, 9K). However, it differs by having 3-foliolate leaves with obvious petiolules (3-5 mm long), unequally 3-sected leaflets, lanceolate to linear, entire or 1-2-denticulate to 1-2-cleft ultimate leaflet segments (Fig. 3C), and styles in the carpels and achenes ca. 0.8 mm long (Fig. 3H, G). In R. pegaeus, the leaves are 3-partite, 3-sected or 3-foliolate with the central segment/leaflet rhombic or oblong, entire or 3-denticulate and the lateral segments/leaflets obliquely flabellate, entire or unequally 2-cleft (Figs 9C, 10), and styles in the carpels and achenes ca. 0.3 mm long (Fig. 9H, G). A detailed morphological comparison between R. jiguanshanicus and R. pegaeus is given in Table 1.</p><p>As mentioned earlier, a gathering of Ranunculus jiguanshanicus, W.B. Ju, L. Zhang &amp; D.K. Chen AZH01290 (CDBI), from Chongzhou in Sichuan, the type locality of this species, had been previously misidentified as R. glareosus (Figs 11 - 14). Morphologically, R. jiguanshanicus is very easily distinguishable from R. glareosus by having glabrous stems (vs. sparsely puberulous) (Figs 3B, 13B), thinly chartaceous leaves (vs. fleshy), leaflets of the 3-foliolate leaves with obvious petiolules (3-5 mm vs. 0.5-2 mm long), unequally 3-sected, with the ultimate leaflet segments narrowly lanceolate to linear, entire or 1-2-denticulate to 1-2-cleft (vs. 3-sected or 3-foliolate, central segment/leaflet ovate or rhombic, entire or 3-lobed, and lateral segments/leaflets flabellate, unequally 2-partite) (Figs 3C, 13C), smaller flowers (5.2-6 mm vs. 15-17 mm in diameter) (Figs 3D, E, 13D, E), abaxially glabrous sepals (vs. puberulous) (Figs 3F, 13F), smaller (3.2-3.5 × 1.8-2 mm vs. 9-10 × 7-8 mm) and obovate petals (vs. widely obovate) (Figs 3G, 13G), subglobose aggregate fruit (vs. ellipsoid) (Figs 3J, 13J), and longer styles in the carpels and achenes (ca. 0.8 mm vs. ca. 0.2 mm long) (Figs 3I, K, 13I, K). In habitat, R. jiguanshanicus grows among moss on rocks or rocky cliffs in moist places in fir forests at altitudes of 2900-3150 m above sea level, whereas R. glareosus grows on alpine scree slopes at altitudes of 3900-4800 m above sea level. A detailed morphological comparison between R. glareosus and R. jiguanshanicus is given in Table 1.</p><p>Additional specimens examined</p><p>(paratypes). China. Sichuan: Chongzhou, W.B. Ju, L. Zhang &amp; D.K. Chen AZH01290 (CDBI); Dayi, W.Q. Fei 897 (IBSC) .</p></div>	https://treatment.plazi.org/id/2BCA64EFA8135D7797AD83B236A8591D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Fei, Wen-Qun;Yuan, Qiong;Yang, Qin-Er	Fei, Wen-Qun, Yuan, Qiong, Yang, Qin-Er (2023): Ranunculus jiguanshanicus (Ranunculaceae), a new species from Sichuan, China. PhytoKeys 219: 57-75, DOI: http://dx.doi.org/10.3897/phytokeys.219.96266, URL: http://dx.doi.org/10.3897/phytokeys.219.96266
