taxonID	type	description	language	source
2BCA64EFA8135D7797AD83B236A8591D.taxon	description	Figs 1, 2, 3, 4, 5	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	diagnosis	Diagnosis. 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).	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	materials_examined	Type. China. Sichuan province: Chongzhou, Anzihe Nature Reserve, Jiguan Shan, 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).	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	description	Description. 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 x 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 x 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 x 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 x 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 x 1.5 - 1.8 mm, elliptic to obovate, patent, green tinged with yellowish, concave, both sides glabrous; petals 5 (- 6), 3.2 - 3.5 x 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 x 0.6 mm, ovoid, laterally flattened, biconvex, glabrous, styles ca. 0.8 mm long, glabrous, apex recurved. Aggregate fruit ca. 4 x 4.2 mm, subglobose; achenes ca. 1.2 x 1 mm, widely ovoid, laterally flattened, biconvex, glabrous, styles ca. 0.8 mm long, persistent, glabrous, apex recurved.	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	etymology	Etymology. 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.	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	distribution	Distribution and habitat. 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.	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	discussion	Discussion. 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 (1995 a, b) placed almost all the alpine species within this section under the name R. sect. Auricomus (Spach) Schur. 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 2 A, B, 8 A, B), small flowers (Figs 3 D, 9 D), subglobose aggregate fruit (Figs 3 I, 9 I), and glabrous carpels (Figs 3 H, 9 H), achenes (Figs 3 G, 9 G) and receptacles (Figs 3 K, 9 K). 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. 3 C), and styles in the carpels and achenes ca. 0.8 mm long (Fig. 3 H, 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 9 C, 10), and styles in the carpels and achenes ca. 0.3 mm long (Fig. 9 H, G). A detailed morphological comparison between R. jiguanshanicus and R. pegaeus is given in Table 1. As mentioned earlier, a gathering of Ranunculus jiguanshanicus, W. B. Ju, L. Zhang & D. K. Chen AZH 01290 (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 3 B, 13 B), 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 3 C, 13 C), smaller flowers (5.2 - 6 mm vs. 15 - 17 mm in diameter) (Figs 3 D, E, 13 D, E), abaxially glabrous sepals (vs. puberulous) (Figs 3 F, 13 F), smaller (3.2 - 3.5 x 1.8 - 2 mm vs. 9 - 10 x 7 - 8 mm) and obovate petals (vs. widely obovate) (Figs 3 G, 13 G), subglobose aggregate fruit (vs. ellipsoid) (Figs 3 J, 13 J), and longer styles in the carpels and achenes (ca. 0.8 mm vs. ca. 0.2 mm long) (Figs 3 I, K, 13 I, 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.	en	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
2BCA64EFA8135D7797AD83B236A8591D.taxon	materials_examined	Additional specimens examined (paratypes). China. Sichuan: Chongzhou, W. B. Ju, L. Zhang & D. K. Chen AZH 01290 (CDBI); Dayi, W. Q. Fei 897 (IBSC).	en	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
