BEGONIACEAE 1. BEGONIA Linnaeus, Sp. Pl. 2: 1056. 1753.

BEGONIACEAE 203
styles 2, fused at base, 4.8–9 mm; stigmas 2-cleft, spiraled. Capsule
nodding, ellipsoid, 9–11 × 6–7 mm, unequally 3-winged;
abaxial wing elliptic to orbicular, 2–3 cm; lateral wings smaller,
4–5 mm. Fl. May–Jul, fr. Jul.
Forests or scrubby vegetation, on rocks of shaded moist slopes or
along streams; (1100–)1600–1700 m. SE Yunnan [Myanmar, Vietnam].
164. Begonia wangii T. T. Yu, Bull. Fan Mem. Inst. Biol., n.s.,
1: 126. 1948.
少 瓣 秋 海 棠 shao ban qiu hai tang
Begonia cavaleriei H. Léveillé var. pinfaensis H. Léveillé.
Herbs. Rhizomes elongate, to 2.5 cm in diam. Leaves basal;
stipules ovate, 0.8–1.9 cm × 4–12 mm, glabrous, apex acuminate
or cuspidate; petiole to 30 cm, glabrous; blade abaxially
red, adaxially dark green, peltate, ovate-oblong to ovate-lanceolate,
slightly asymmetric, 7–20 × 3–11 cm, ca. 2 mm thick, glabrous,
venation palmate, 5–7-veined, base rounded, margin entire,
apex acuminate. Inflorescences to 40 cm, glabrous; bracts
ovate, 5–8 × 3–6 mm, glabrous, apex acuminate. Staminate flowers:
pedicel 0.9–1.9 cm; tepals 2, pink, broadly ovate to oblateorbicular,
1.5–1.9 × 1.2–2.3 cm, apex acute; stamens ca. 60;
filaments 1–3.7 mm, fused at base; anthers obovoid, 0.8–1.7
mm, apex truncate or emarginate. Pistillate flowers: pedicel
2.5–3.6 cm; tepals 2, pink, orbicular-ovate, 1.4–2.1 × 1–2.5 cm,
apex acute; ovary 3-loculed; placentae axile, bilamellate; styles
3, 5.5–8.1 mm, free; stigmas 2-cleft, spiraled. Capsule nodding,
unequally 3-winged; abaxial wing lunate, ca. 5 × 1.9–2 cm; lateral
wings smaller, ca. 2 mm.
● Scrubby vegetation, on limestone rocks; (600–)800–1000 m. W
Guangxi (Jingxi, Napo), SE Yunnan (Malipo).
165. Begonia wenshanensis C. M. Hu ex C. Y. Wu & T. C. Ku,
Acta Phytotax. Sin. 33: 262. 1995.
文 山 秋 海 棠 wen shan qiu hai tang
Herbs, 26–35(–39) cm tall. Rhizomes poorly developed,
8–10 mm in diam. Stems subglabrous, sometimes branching.
Leaves cauline; stipules caducous, ovate-lanceolate, ca. 7 mm,
membranous, subglabrous, apex obtuse; petiole 2–4 cm, subglabrous;
blade triangular-ovate, asymmetric, 7–12 × 4.5–7 cm,
abaxially glabrous or sparsely hispidulous, adaxially sparsely
hispidulous, base oblique, cordate, margin irregularly denticulate,
very shallowly lobed, apex acuminate or caudate-acuminate.
Inflorescences 3.5–7 cm, glabrous; bracts lanceolate, 6–8
mm, membranous. Staminate flowers: pedicel 1–1.2 cm; tepals
4, pinkish, outer 2 narrowly ovate, 1–1.3 cm, abaxially villous,
inner 2 elliptic, ca. 3 × 1.5 mm; stamens numerous; filaments
ca. 2 mm, fused to halfway; anthers oblong, ca. 0.8 mm. Pistillate
flowers: pedicel 1–1.2 cm; tepals 3, pinkish, unequal, largest
broadly ovate, ca. 10 × 9 mm, glabrous, smallest elliptic, ca.
5 × 2 mm; ovary glabrous, 3-loculed; placentae axile, bilamellate;
styles 3; stigmas U-shaped, slightly spiraled. Capsule pendulous,
ellipsoid, 9–11 × 5–6 mm, unequally 3-winged; abaxial
wing narrowly triangular or falcate, ca. 1 cm; lateral wings smaller.
Fl. Jul–Aug, fr. Aug.
● Evergreen broad-leaved forests, moist environments along
streams; 1400–2200 m. Yunnan (Funing, Wenshan).
166. Begonia wilsonii Gagnepain, Bull. Mus. Natl. Hist. Nat.
25: 281. 1919.
一 点 血 yi dian xie
Herbs, deciduous. Tubers compressed, 0.8–1.2(–1.5) cm in
diam. Leaves usually 1(or 2); stipules caducous, ovate-lanceolate;
petiole 11–19(–25) cm, subglabrous; blade sometimes purple
abaxially, broadly ovate, slightly asymmetric, 12–20 × 8–18
cm, subglabrous, venation palmate, 6- or 7-veined, base oblique,
shallowly cordate, margin irregularly serrulate, shallowly lobed,
divided to 1/3 of leaf length; lobes 3–7(–9), apex long caudate.
Inflorescences terminal, racemose at base, glabrous; peduncle
8–35(–50) cm; bracts ovate-lanceolate, ca. 5 × 2 mm, membranous,
apex acuminate. Staminate flowers: pedicel 1–1.5 cm; tepals
4, pinkish, outer 2 ovate to broadly ovate, 1.1–1.2 × 1.1–
1.4 cm, glabrous; inner 2 oblong-obovate, 0.8–1.2 cm × 4–7
mm; stamens 8–13; filaments fused at base, 1.7–2 mm; anthers
obovoid-oblong, 1.4–2 mm, apex rounded or emarginate. Pistillate
flowers: pedicel 1.8–2.2 cm; tepals 3 or 4, pinkish, outer 2
broadly oblong or suborbicular, 12–14 × 9–10 mm, inner 1 or 2
elliptic, 5–10 × 2–6 mm; ovary glabrous, 3-loculed; placentae
axile, undivided; styles 3, ca. 3 mm, nearly free; stigmas U-
shaped. Capsule pendulous, trigonous, clavate, 1–1.2 cm × 3–
5 mm, wingless. Fl. Aug, fr. Sep.
● Forest understories, on rocks in shaded moist environments on
slopes or along streams. Chongqing (Nanchuan), Sichuan (Emei Shan,
Hongxi).
This species is similar to Begonia labordei but differs by the undivided
placentae and the wingless capsule.
167. Begonia wutaiana C. I Peng & Y. K. Chen, Bot. Bull.
Acad. Sin. 46: 268. 2005.
雾 台 秋 海 棠 wu tai qiu hai tang
Herbs. Rhizomes poorly developed. Stems 40–70 cm tall,
to 1.4 cm in diam. Leaves cauline; stipules caducous, lanceolate
to ovate, 1.8–2.4 × 1.2–1.5 cm, glabrous, margin entire, apex
acuminate; petiole glabrous, 5–14 cm; blade lanceolate to narrowly
ovate, 9–18 × 4–7 cm, glabrous, venation palmate-pinnate,
6–9-veined, base oblique, cordate, margin irregularly serrulate,
apex acuminate. Inflorescence 6–14 cm; peduncle to 11
cm; bracts caducous, narrowly ovate to ovate, 0.9–2.1 cm × 5–
15 mm, thickly papery, glabrous, margin entire, apex acuminate.
Staminate flowers: tepals 4, white or pinkish, outer 2 orbicular,
1.1–1.8 × 0.8–1.8 cm, inner 2 oblanceolate to narrowly
obovate, 0.9–1.6 cm × 4–9 mm; stamens 41–53; filaments 2–
2.8 mm; anthers narrowly oblong, 2.4–2.9 mm. Pistillate flowers:
tepals 5(or 6), white or pinkish, unequal, narrowly obovate
to orbicular, largest 0.9–1.6 cm × 7–15 mm, smallest 6–13 × 4–
7 mm; ovary ellipsoid, locules 2; placentae axile, bilamellate;
styles 2, fused at base; stigmas 2-cleft, spiraled. Capsule trigonous,
unequally 3-winged; abaxial wing 1.5–2.5 × 1.5–2.3
cm; lateral wings smaller. 2n = 52*.
● Forests; 800–1800 m. S Taiwan.
This species is similar to Begonia chuyunshanensis but differs by
its longer anthers and 2-loculed ovary.