taxonID	type	description	language	source
7308B2AAD05F5D4EBCF32BA656D4C2B9.taxon	description	Fig. 1, Table 1 Chinese name: 狭苞秋海棠	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
7308B2AAD05F5D4EBCF32BA656D4C2B9.taxon	diagnosis	Diagnosis. The new species is mostly similar to the green-leaved individuals of B. fimbristipula Hance (Hance 1883), but differs mainly by its leaves sparsely hairy (vs. densely hairy), with a bracteole at the top of the pistillate flower pedicel (vs. without), larger (10 – 12 × 12 – 13 vs. 6 – 8 × 9 – 11 mm) outer tepals of pistillate flower, placentae unilamellate (vs. bilamellate), and later flowering (June – July vs. April – May).	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
7308B2AAD05F5D4EBCF32BA656D4C2B9.taxon	description	Description. Herb perennial, 2 – 20 cm tall, monoecious, tuber spherical, 8 – 25 mm in diameter. Leaves usually 1 per plant, sometimes 2 (more common in large plants); membranous, slightly asymmetric to near symmetrical, cordate, oval or ovate, 5 – 38 × 4 – 32 cm, wide side 2.2 – 17.5 cm, narrow side 2 – 15 cm, adaxially green, covered with very short rough hairs, hairs ≤ 0.5 mm, venation palmate, veins 10 – 11 (– 12), concave; abaxially grayish-green, veins convex, covered with grayish-white villous, hairs 1 – 5 mm long, longer at the base of primary veins; margin heavily serrate and short grayish-green hairy, hairs ca. 1 mm long, apex acute and often coarsely toothed. Petioles green, light green or pink, 1.5 – 20 cm long, 1.5 – 9 mm thick, light green longitudinal spotted and grayish-white villous, hairs ≤ 6 mm long, or sparsely pale-white hairs on the upper of petioles; petiole base grooved. Inflorescence: dichasial cyme, 1 per plant, occasionally 2, 5 – 33 cm long; peduncle 3 – 23 cm long, 2 – 6 mm thick, reddish-brown, glabrous, 3 – 10 flowers per inflorescence. Bracts nearly persistent, nearly linear, 3 – 6 × 1 – 2 mm, basal bracts with 3 red longitudinal stripes, upper bracts with red midribs. Staminate flower: pedicel light green, usually gradually turning pink downwards, glabrous, 10 – 50 mm long, 1 mm thick; flower 16 – 23 × 18 – 25 mm; tepals 4, glabrous, outer 2 ovate, 8 – 12 × 8 – 12 mm, adaxially pink, slightly light green on the top edge, depressed and slightly thick in central part; abaxially color slightly lighter, nearly pinkish-white; inner 2 narrowly oblanceolate, pinkish-white, 9 – 12 × 4 – 5 mm, lighter and thinner than outer tepals; androecium nearly capitate, actinomorphic, 1.5 – 2 mm long, 2 – 3 mm wide; stamens 27 – 45, filaments basally fused, stamen column nearly 2 mm long, filaments and anthers nearly 1 mm long, fragrance pleasant. Pistillate flower: pedicel light green, glabrous, 20 – 24 mm long, ca. 1 mm thick, with a bracteole on the top of pedicel or below ovary, 4 – 5 × ca. 1.5 mm; flower 13 – 21 × 12 – 14 mm, tepals 3, glabrous, outer 2 ovate, pinkish-white, slightly flat, the middle and lower parts gradually turning dark pink, 10 – 12 × 12 – 13 mm; inner 1 oblanceolate; pistils 4 – 5 × 3 – 4 mm, styles 3, nearly free, ca. 2 mm long; ovary 3 locular, placentation axile, placentae unilamellate. Fruit: stalk 10 – 28 mm long, ca. 1 mm thick; capsule 6 – 9 × 4 – 6 mm, unequally 3 - winged, large one nearly triangular or rectangular-triangular, 10 – 18 × 9 – 19 mm, lateral wings sickle-shaped, 1.5 – 3 × 8 – 10 mm.	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
7308B2AAD05F5D4EBCF32BA656D4C2B9.taxon	etymology	Etymology. The epithet “ angustibracteata ” refers to the narrow bracts of this new species. The Chinese name is given as “ 狭苞秋海棠 ”.	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
7308B2AAD05F5D4EBCF32BA656D4C2B9.taxon	distribution	Distribution and habitat. The new species has been found only in three places restricted to Guiping City and Hengzhou City of Guangxi (Fig. 2). It grows on rock cliffs or in shaded places of valleys at an altitude of 30 – 300 m.	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
E576085620B558168EEB5195C333F84C.taxon	description	Fig. 3, Table 1 Chinese name: 白石山秋海棠	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
E576085620B558168EEB5195C333F84C.taxon	diagnosis	Diagnosis. Begonia baishishanensis is most similar to B. danxiaensis D. K. Tian & X. L. Yu (Tian et al. 2019), but differs in its larger (3 – 21 × 2.6 – 20.3 cm vs. 2 – 13 × 1.5 – 13.5 cm) and thicker (vs. thinner) leaves, hairy (vs. nearly glabrous) bract margins, larger outer tepals of staminate flower (13 – 17 × 10 – 14 mm vs. 4 – 11 × 3 – 10 mm) and pistillate flower (10 – 13 × 11 – 15 mm vs. 3 – 9 × 4 – 9 mm), more (47 – 88 vs. 10 – 38) stamens, and placentae bilamellate (vs. unilamellate). The species is also similar to B. fimbristipula (Hance, 1883) belonging to B. section Diploclininum, but mainly differs by its larger (3 – 21 × 2.6 – 20.3 cm vs. 4 – 13 × 4.8 – 8.5 cm) and thicker (vs. thinner) leaves, shorter (≤ 0.5 mm vs. ≥ 1 mm long) hairs on adaxial leaf surface, larger outer tepals of pistillate flower (13 – 17 × 10 – 14 mm vs. 8 – 13 × 8 – 10 mm) and pistillate flower (10 – 13 × 11 – 15 mm vs. 6 – 8 × 9 – 11 mm).	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
E576085620B558168EEB5195C333F84C.taxon	description	Description. Herb perennial, 3 – 15 cm tall, monoecious, tuber spherical, usually 2 – 3 connected, 8 – 30 mm in diameter; erect stem absent or with 1 at anthesis, 0.2 – 4 cm long, 3 – 8 mm thick. Stipules long triangular, ca. 6 mm long, covered with grayish-white long rough hairs. Leaves usually 1, rarely 2 per plant, blade cordate, nearly symmetrical, 3 – 21 × 2.6 – 20.3 cm, wide side 1.4 – 10.1 cm, narrow side 1.2 – 10.1 cm; adaxially green, rarely dark green, covered with grayish-white short rough hairs, hairs usually ≤ 1 mm long, venation palmate, veins 9 – 10, concave; abaxially gray-green, rarely purple-red, grayish-white villous, hairs 1 – 5 mm long, longer (up to 4 mm) at the base of primary veins, primary veins convex, secondary veins slightly convex; lobes of leaf base valvate to acute angled or slightly overlapped, margin with few serrate and short cilia, apex acuminate or short acuminate. Petioles green, rarely red, 0.8 – 18 cm long, 1.2 – 6 mm thick, grayish-white villous, hairs up to 4 mm long, denser on the top position. Inflorescence: dichasial cyme, basal, usually 1, rarely 2 per plant, 4 – 40 cm long, peduncle 1.5 – 24 cm long, 0.8 – 8 mm thick, nearly glabrous, 2 – 15 flowers per inflorescence. Bracts light green, long triangular to nearly lanceolate, 4 – 11 × 1.5 – 5 mm, margin ciliate. Staminate flower: pedicel greenish-white with pink, glabrous, 10 – 19 mm long, 0.6 – 0.8 mm thick; flower 26 – 34 × 25 – 31 mm, tepals 4, pink, coloration even, glabrous; outer 2 ovate or oval, 13 – 17 × 10 – 14 mm; inner 2 nearly obovate or obovate-lanceolate, 11 – 19 × 7 – 9 mm; androecium nearly capitate, actinomorphic, 3 – 4 × 4 – 5 mm; stamens 47 – 88; filaments base fused, connate part ca. 1.5 mm long, free part 1 – 1.5 mm long, anthers 0.8 – 1 mm long. Pistillate flower: pedicel pink, glabrous, 8 – 13 mm long, 0.6 – 0.8 mm thick; flower 22 – 26 × 12 – 19 mm, tepals 3, pink, coloration nearly even, glabrous; outer 2 broadly ovate or ovate, slightly flat, 10 – 13 × 11 – 15 mm; inner 1 obovate or obovate-lanceolate, 6 – 12 × 3 – 7 mm; pistils 4 – 5 × 3 – 5 mm; styles 3, nearly free, 1.5 – 2 mm long; ovary 3 locular, placentation axile, placentae bilamellate. Fruit: stalk 11 – 20 mm long, ca. 1 mm thick, capsule 8 – 11 × 6 – 9 mm, unequally 3 - winged, larger one nearly rectangular or triangular-rectangular, 11 – 15 × 10 – 15 mm, apex nearly obtuse or pointed; smaller wings sickle-shaped, 1 – 2 × 7 – 16 mm.	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
E576085620B558168EEB5195C333F84C.taxon	etymology	Etymology. The epithet “ baishishanensis ” refers to Baishishan, a mountain name of Guiping City and the type locality of this species. The Chinese name is given as “ 白石山秋海棠 ”.	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
E576085620B558168EEB5195C333F84C.taxon	distribution	Distribution and habitat. One population including four subpopulations of B. baishishanensis are found on rock walls or grass, or in rock crevices of Danxia landform cliff of Baishishan of Guiping City, Guangxi, China (Fig. 2).	en	Hu, Renchuan, Zhou, Jinye, Zhao, Ziyi, Lai, Kedao, Wu, Yannong, Tian, Daike (2025): Two new tuberous species of Begonia (Begoniaceae) from Guangxi, China. PhytoKeys 256: 119-129, DOI: 10.3897/phytokeys.256.145725
