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

BEGONIACEAE 199
asymmetric, 4.5–14 × 1.5–4 cm, glabrous, venation palmatepinnate,
5- or 6-veined, base rounded, margin remotely and
minutely serrulate, apex long acuminate or long caudate. Inflorescences
2–4 cm; glabrous; bracts oblong, 2–7 × 0.6–4 mm,
glabrous. Staminate flowers: pedicel 0.6–2.6 cm; tepals 2, yellowish
green, orbicular, 3–8 × 3.5–9 mm; stamens 25–31; filaments
free, 1–2 mm; anthers obovoid, 0.6–1.1 mm. Pistillate
flowers: pedicel 0.6–2.6 cm; ovary oblong, 5–7 mm, glabrous,
3-loculed; placentae axile, bilamellate; tepals 2(or 3), yellowish
green, broadly ovate, 3–7 × 4–10 mm; styles 3, fused to halfway,
2.1–3.3 mm; stigmas 2-cleft, slightly spiraled. Capsule
pendulous, oblong-ovoid, 1.3–1.4 cm × 6–7 mm, unequally 3-
winged; abaxial wing triangular, 1.1–1.4 cm; lateral wings
smaller, 3–4 mm. Fl. Jul, fr. Aug.
● Forests, on limestone rocks; ca. 200 m. Guangxi (Longzhou).
148. Begonia sinovietnamica C. Y. Wu, Acta Phytotax. Sin. 35:
50. 1997 [“sino-veitnamica”].
中 越 秋 海 棠 zhong yue qiu hai tang
Herbs. Rhizomes elongate. Stems absent or very short.
Leaves basal; stipules ovate-oblong, 7–11 mm, membranous,
abaxially pubescent, margin entire, apex cuspidate; petiole 8–20
cm, densely reddish brown villous; blade ovate or broadly
ovate, asymmetric, 5.5–11 × 4.8–8.5 cm, abaxially densely hirsute,
adaxially hirsute, venation palmate, 6–8-veined, base
oblique, cordate, margin irregularly serrulate or biserrate, apex
shortly caudate or acuminate. Inflorescences 9–12 cm tall; hispidulous
or subglabrous; bracts lanceolate, ca. 8 mm, margin
ciliate, apex acuminate. Staminate flowers: pedicel 1–1.5 cm;
tepals 4, white, outer 2 broadly ovate-oblong, ca. 2.1 × 1.6 cm,
abaxially shortly pilose, inner 2 oblong, ca. 1.2 × 5–6 mm;
stamens numerous; filaments ca. 1.2 mm, free; anthers oblong,
ca. 1.5 mm, apex obtuse. Pistillate flowers: pedicel 1–1.5 cm;
tepals 5, white, outer 2 obovate-oblong, glabrous; ovary glabrous
or sparsely short-pilose, 3-loculed; placentae axile, bilamellate;
styles 3, fused at base; stigmas 2-cleft, spiraled. Capsule
nodding, ovoid, ca. 1 × 1.1 cm, subequally 3-winged. Fl.
Jul, fr. Aug.
● Understories of broad-leaved forests, on slopes or by streams.
Guangxi (Dongxing, Guiping).
149. Begonia smithiana T. T. Yu, Notes Roy. Bot. Gard. Edinburgh
21: 44. 1951.
长 柄 秋 海 棠 chang bing qiu hai tang
Herbs. Rhizomes elongate, 5–10 mm in diam. Stems very
short. Leaves mostly basal; stipules ovate, 3.5–5 × 2–3 mm,
subglabrous, apex acuminate; petiole sometimes reddish, to 25
cm, sparsely to densely hairy; blade sometimes purple-red on
veins, ovate to broadly ovate, rarely oblong-ovate, asymmetric,
(3.5–)5–9(–12) × 3–5(–8) cm, abaxially hirsute, adaxially
sparsely hispidulous, venation palmate, 6- or 7-veined, base
oblique cordate, margin irregularly serrate, very shallowly lobed,
apex caudate or acuminate. Inflorescences 12–20(–30) cm tall,
subglabrous. Staminate flowers: pedicel 1.2–2.0 cm; tepals 4,
pinkish, outer 2 broadly ovate, 1–1.4 × 0.8–1.6 cm, abaxially
hairy, inner 2 oblong-ovate, 0.6–1.3 cm × 3–9 mm; stamens 68–
81; filaments 1–3.9 mm, fused at base; anthers obovoid, 1–1.7
mm. Pistillate flowers: pedicel 1.2–1.5 cm; tepals 5, pinkish,
largest broadly ovate, 8–14 × 7–13 mm, abaxially pilose, smallest
narrowly elliptic to oblong-obovate, 4–14 × 2–10 mm;
ovary sparsely hairy, 2-loculed; placentae axile, bilamellate;
styles 2, fused to 2/3, ca. 4.7 mm; stigmas 2-cleft, spiraled. Capsule
nodding, obovoid-globose, unequally 3-winged; abaxial
wing subtriangular, ca. 1.5 cm, apex obtuse; lateral wings smaller.
Fl. Aug, fr. Sep.
● Forests or scrubby vegetation, on rocks in shaded moist environments
along streams or in valleys; 700–1300 m. Guizhou, Hubei,
Hunan, Sichuan.
150. Begonia subhowii S. H. Huang, Acta Bot. Yunnan. 21: 20.
1999.
粉 叶 秋 海 棠 fen ye qiu hai tang
Herbs. Rhizomes elongate. Stems absent or very short.
Leaves mostly basal; petiole 18–20 cm, glabrous; blade obliquely
ovate, asymmetric, 4.5–9 × 10–11 cm, glabrous, venation
palmate, base cordate, margin irregularly serrulate, apex acute
to shortly caudate. Inflorescences glabrous; bracts ovate, to 5 ×
3 cm, glabrous, apex acuminate. Staminate flowers: pedicel 1–2
cm; tepals 4, white to pinkish, outer 2 elliptic, ca. 2 × 1.2 cm,
glabrous, inner 2 oblong, ca. 1.5 × 0.6 cm; stamens numerous;
filaments ca. 1 mm; anthers obovoid-oblong, ca. 1.5 mm, apex
rounded. Pistillate flowers: pedicel ca. 1.5 cm; tepals 5, white to
pinkish, unequal, broadly ovate to broadly elliptic; ovary glabrous,
2-loculed; placentae axile, bilamellate; styles 2, free;
stigmas 2-cleft, spiraled. Capsule nodding, unequally 3-winged;
abaxial wing ligulate, ca. 1.5 × 1.3 cm; lateral wings ca. 7 mm.
Forest understories, on limestone; 700–1500 m. Yunnan (Malipo)
[Vietnam].
This species is similar to Begonia howii but differs by its obliquely
ovate leaves and the bracts up to 5 cm.
151. Begonia sublongipes Y. M. Shui, Acta Bot. Yunnan. 26:
484. 2004.
保 亭 秋 海 棠 bao ting qiu hai tang
Herbs, prostrate. Stems 28–30 cm, sparsely hispid. Leaves
cauline; stipules ovate-triangular, 8–9 × 3–4 mm, glabrous,
apex acuminate and cuspidate; petiole 5–14 cm, hispid; blade
ovate-elliptic, asymmetric, 7–8 × ca. 4.5 cm, abaxially glabrous,
adaxially pubescent on veins, venation palmate-pinnate, 5- or 6-
veined, base strongly oblique, cordate, margin shallowly and
sparsely denticulate, apex shortly acuminate. Staminate flowers:
tepals 2. Pistillate flowers not seen. Capsule solitary, axillary,
broadly obtriangular, ca. 1.8 × 2 cm, glabrous, subequally 3-
winged, 3-loculed; placentae axile, bilamellate; styles 3, 2–2.5
mm, free; stigmas U-shaped, spiraled.
● Forests. Hainan (Baoting).
Begonia sublongipes is known only from the type gathering made
in 1936. Further gatherings would be desirable to understand this entity.
152. Begonia suboblata D. Fang & D. H. Qin, Acta Phytotax.
Sin. 42: 177. 2004.
都 安 秋 海 棠 du an qiu hai tang