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Flora of Taiwan | Family List | Begoniaceae | Begonia

Begonia chitoensis Liu & Lai, Fl. Taiwan. 1st Ed. 3: 793, pl. 820. 1977; Chen, Fl. Taiwan. 2nd Ed. 3: 848. 1993.


Begonia chitoensis

Credit: Ching-I Peng

Plant terrestrial; evergreen; with long creeping rhizomes from which upright stems arise, monoecious. Stems 40-95 cm long, to 18 mm across, glabrous. Rhizomes (color), to ___ cm long, ___ mm across, glabrous. Stipules caducous, ovate to broadly ovate, apex acuminate, margins entire, to 26 mm long, 18 mm wide, glabrous. Leaves many, herbaceous, asymmetric, broadly ovate to orbicular, undivided, apex acuminate to cuspidate, base cordate, margins irregularly denticulate or serrulate, 9-34 cm long, 7-29 cm wide, glabrous adaxially, remotely minutely scaberulous abaxially; venation palmate; petioles 6-24 mm long, to 9 mm across, glabrous or sometimes remotely pilose. Inflorescences arise from stem, 12-40 cm long, glabrous; peduncles (inflorescence axis), to 31 cm long, 5 mm across, erect. Bracts caducous,ovate to broadly ovate, apex acute, margins entire, to 25 mm long, 19 mm wide, glabrous. Flowers of both sexes pale pink or sometimes purplish, glabrous. Staminate flowers: tepals 4, outer two obovate to orbicular, 11-28 mm long, 10-26 mm wide, inner two oblanceolate to obovate, 10-26 mm long, 4-13 mm wide; androecium actinomorphic; stamens 78-142, yellow,golf-club shaped, filaments free, 0.8-2.4 mm long; anthers obovate, 2-2.3 mm long, 1.1-1.5 mm across. Pistillate flowers: tepals 5-6(7), oblanceolate to orbicular, unequal, the largest 9-26 mm long, 8-23 mm wide, the smallest 8-24 mm long, 4-11 mm wide; ovary (color) when blooming, inferior, glabrous; styles 2, yellow, free, forked once, 4.7-5.4 mm long; stigmas in a band and spiraled. Fruits capsular, dehiscence, nodding, (color), trigonous, unequally 3-winged, abaxial wing broadly elliptic to orbicular, to 19-32 mm long, 11-22 mm wide, lateral wings lunate, 4-6 mm long, 9-15 mm wide; locules 2, axile placentation, placental branches 2 per locule.

TAOYUAN: Kaoyii-Paling, Chen 117 (HAST), Peng 11055, 11056, 11057 (HAST).
HSINCHU: Tuchang-Kuanwu, Peng 8401 (HAST); Wuchihshan, Kawakami & Mori s. n. 1907. (HAST).
MIAOLI: Nanchuang, Hsu 12961 (TAI).
TAICHUNG: Tungshih Forest Station, Chen 391 (HAST); Tungmaoshan, Lu 8311 (TCF); Tahsuehshan Logging Trail, Ou 8342 (TCF); Chingshan-Kukuan, Wang 2959; Pahsienshan, Hsu & Liu 168 (HAST).
NANTOU: Meifeng, Chen 51 (HAST); Meifeng-Sungkang, Peng 9078 (HAST); Wushe, Sasaki s.n. Mar. 8, 1918, s.n. Jul. 27, 1922 (TAI), Li 3478 (TCF), Sasao s.n. Oct. 25, 1932 (TAI); Huisun Forest Station, Liu 8565 (TCF); Wuchieh, Ou 911 (TCF); Guandaushi, Kuoh 4297 (TAI); Wangyang, Sasaki s.n. 1922 (TAI); Chito; Ou 3057 (TCF), Lai 1785 (Holotype, NTUF), Huang 3456 (TAI), Chuang 4015 (TAI); Fenghuangshan, Chen 217, 747 (HAST), Peng 10518 (HAST); Sun-Moon Lake, Kudo & Sasaki 15607 (TAI).
CHIAYI: Chiaoliping, Yang 3515 (TAI, HAST).

Stolons: absent

Stipules: caducous

Stipules: shape: ovate, broadly ovate

Stipules: apex: acuminate

Stipules: margin: entire

Stipules: length (mm): mm

Stipules: width (mm): mm

Stipules: indumentum: glabrous

Leaves: shape: broadly ovate, orbicular

Leaves: apex: acuminate, cuspidate

Leaves: margin: denticulate, serrulate, dentate

Leaves: length (cm): 9-34 cm

Leaves: width (cm): 7-29 cm

Leaves: indumentum: scaberulous

Venation: palmate

Veins: number: 7-9

Petioles: length (cm): 6-24 cm

Petioles: diameter (mm): 9 mm

Petioles: indumentum: glabrous, pilose

Bracts: caducous

Bracts: shape: ovate, broadly ovate

Bracts: apex: acute

Bracts: margin: entire

Bracts: length (mm): 25 mm

Bracts: width (mm): 19 mm

Bracts: indumentum: glabrous

Peduncles:: erect

Peduncles: length (cm): 31 cm

Peduncles: diameter (mm): 5 mm

Flowers: color: pinkish, purplish

Male flower petals: number: four

Outer 2 tepals of male flowers: shape: ovate, orbicular

Outer 2 tepals of male flowers: length (mm): 11-28 mm

Outer 2 tepals of male flowers: width (mm): 10-26 mm

Inner 2 tepals of male flowers: shape: oblanceolate, narrowly obovate

Inner 2 tepals of male flowers: length (mm): 10-24 mm

Inner 2 tepals of male flowers: width (mm): 4-13 mm

Stamens: number: 78-142

Stamens: shape: golf-club shaped

Anthers: shape: obovoid

Anthers: length (mm): 2-2.3 mm

Anthers: diameter (mm): 1.1-1.5 mm

Filaments: length (mm): 0.8-2.4 mm

Female flower tepals: number: five, six, more than six

Female flower tepals: equality of size: unequal

The largest tepals of female flowers: length (mm): 9-26 mm

The largest tepals of female flowers: width (mm): 8-23 mm

The smallest tepals of female flowers: length (mm): 8-24 mm

The smallest tepals of female flowers: width (mm): 4-11 mm

Styles: number: two

Styles: length (mm): 4.7-5.4 mm

Locules number: two

Fruits: typ: capsule

Fruits: wings: 3-winged

Abaxil wing of fruits: shape: broadly elliptic, orbicular

Abaxil wing of fruits: length (mm): 19-32 mm

Abaxil wing of fruits: width (mm): 11-22 mm

Lateral wings of fruits: length (mm): 4-6 mm

Lateral wings of fruits: width (mm): 9-15 mm

Seeds: shape: broadly ellipsoid

Seeds: length (mm): 0.34-0.37 mm

Seeds: diameter (mm): 0.23-0.26 mm

Seed apex: shape: rotund

Seed micropylar end: constricted

Chrosome numer 2n=: 36

Elevation (m): 450-2200 m

Distribution: Taoyuan, Hsinchu, Miaoli, Taichung, Nantou, Chiayi

Plant: growth form: terrestrial

Phenology: evergreen

Stems: habit: rhizomatous, with long ascentant rhizomes from which upright stems arise


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