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
