Plant terrestrial or epipetric; evergreen; with long creeping rhizomes from which upright stems arise, monoecious. Stems 35-90 cm long, to 23 mm across, rusty villose. Rhizomes ___ cm long, to 21 mm across, (hair). Stipules caducous, narrowly ovate to ovate, apex acuminate, margins entire, to 28 mm long, 18 mm wide, rusty villous abaxially. Leaves many, basal and cauline, herbaceous, asymmetric, broadly ovate to very broadly ovate, shallowly lobed, divided to 1/3 of leaf length at most, apex acuminate, base cordate, margins irregularly denticulate or serrulate, 7-31 cm long, 6-27 cm wide, very densely scabrous, hirsute or rusty villose on both surface, hirsute at margins; venation palmate; petioles, 6-27 mm long, 8 mm across, densely rusty villous, lobes (number), (shape), apex (shape). Inflorescences arise from stem, 9-24 cm long, densely rusty villous; peduncles (inflorescence axis) 6-16 cm long, to 4 mm across, erect. Bracts caducous, ovate, apex acute, margins ciliate, 7-15 mm long, 4-8 mm wide, densely villous. Flowers of both sexes pinkish, outer tepals densely villous. Staminate flowers: tepals 4, outer two obovate to orbicular, 10-26 mm long, 9-24 mm wide, inner two oblanceolate to narrowly obovate, 9-24 mm long, 5-9 mm wide; androecium actinomorphic; stemans 116-187, golf-club shaped, yellow, filaments free, 0.8-2.4 mm long; anthers narrowly obovoid, 1.9-2.3 mm long, 0.9-1.2 mm across. Pistillate flowers: tepals 5-6(7), oblanceolate to orbicular, unequal, the largest 9-24 mm long, 8-22 mm wide, the smallest 8-21 mm long, 4-9 mm wide; ovary (color) when blooming, inferior, rusty villous; styles 2, yellow, free, forked once, 4.9-5.6 mm long; stigmas in a band and spiraled. Fruits capsular, dehiscence, nodding, trigonous, unequally 3-winged, abaxial wing triangular, elliptic to narrowly oblong, 15-32 mm long, 7-14 mm wide, lateral wings 4-6 mm long, 6-13 mm wide; locules 2, axile placentation, placental branches 2 per locule.

TAIPEI: Hapen, Nakamura s.n. Aug. 5, 1938 (TAI), Suzuki s.n. Jul. 21, 1938 (TAI).
HUALIEN: Chinkualiao, Sasaki s.n. Mar. 18, 1918 (TAIF).
TAICHUNG: Kukuan, Liu s.n. Oct. 1979 (TCF); Pahsienshan, Sasaki 5660 (TAI). NANTOU: Chitou, Chen 218 (HAST), Peng 5301, 10506 (HAST), Chang s.n. Sep. 28, 1978 (PPI), Liu s.n. Dec. 18, 1961 (NTUF), Lai s.n. Dec. 22, 1979 (TCF), Ying 726 (NTUF), Liu 514 (NTUF), Lai 726 (NTUF), Yamamoto s.n. Oct. 24, 1933 (TAI), Chito-Shanlinhsi, Peng 5346 (HAST); Fenghuangshan, Yang 1004 (TAI), Chen 754 (HAST), Kuo 10337 (TAI); Tungpu Hotspring-Tsaihung Waterfall, Peng 6539 (HAST); Hoshe, Peng & Chen 10931 (HAST), Suzuki 324 (TAI), Hoshe Giant Tree, Peng & Chen 10985 (HAST); Huisun Forest Station, Chang 12273 (PPI), Liu 8523 (TCF), Ying 1176 (NTUF); Guandaushi, Chang 6397 (PPI), Lu & Ou s.n. Sep. 18, 1969 (TCF), Meiyuan, Sasao s.n. Apr. 25, 1931 (TCF), Satio s.n. Aug. 30, 1924 (TAI), Yoshihide s.n. Mar. 1929 (TAI), Suzuki s.n. Oct. 12, 1935 (TAI); Shuili, Liu & Kuo 349 (NTUF); Chingshuikou, Liu & Kuo 349 (NTUF), Huang 1920 (NTUF), Huang 1920 (NTUF); Meihsi-Puli, Kudo & Mori 2363 (TAI); Shuishe, Hayata s.n. May 1914 (TAIF), Sasaki s.n. Sep. 12, 1929 (TAI); Tungpushan, Sasaki s.n. Oct. 6, 1909 (TAIF); Yuchin, Shimada s.n. Aug. 4, 1929 (TAIF); Tachuan, Sasaki s.n. Jul. 25, 1932 (TAI); Puli, Mao 2092 (TAI); Tsuifeng, Suzuki s.n. Aug. 28, 1932 (TAI); Sun-Moon Lake, Kuoh 3885 (TAI); Wangyang, Sasaki s.e. s.n.
CHIAYI: Lungmei-Tsaoshan, Peng 10076 (HAST); Chiehtung-Tungshan, Peng 8872 (HAST); Fenchihu, Feung & Kao 4926 (TAI), Ying 4457 (NTUF); Fenchihu-Tolin, Sasaki s.n. Feb. 1913 (TAIF); Alishan, Hayata & Sasaki s.n. Jan. 1912 (NTUF), Huang & Kao 1773 (TAI); Meishan, Kawakami s.n. Apr. 1909 (TAIF).
KAOHSIUNG: Tengchih, Chen & Peng 358 (HAST), Chen 543, 733 (HAST), Chung 307, Yang 5678, 6093, 6094, 6101 (PPI), Lu & Ou 6851 (TCF), Huang 6467 (TAI), Yamazai et al. 869 (TAI); Tona Logging Trail, Chen & Peng 377 (HAST); Shanping, Chen 101, 520 (HAST), Huang s.n. Nov. 5, 1986 (PPI), Chune s.n. Jul. 7, 1984 (PPI), Ou 2887 (TCF), Lu & Ou 3324 (TCF), Liu & Ou 2086 (TCF), Chang 2081 (TAI), Hunag 4934 (TAI); Lungchien-Hsinanshan, Yamamoto & Mori 711 (TAI); Liukuei, Chao 727 (TAI); Nanfengshan, Chuang 3379 (TAI); Shanping-Nanfengshan, Chang 2084 (TAI).
PINGTUNG: Machia, Peng 10614 (HAST); Wutoushan, Yang 6197 (PPI); Lilungshan, Chen & Liu 819 (HAST); Peitawushan, Matuda s.n. Nov. 20, 1918 (TAIF), Kuo 28 (PPI); Entrance to Peitawushan, Chen 645, 693, 733, 754 (HAST); Weiliaoshan, Yamada 27 (TAI).
TAITUNG: Shenshan, s.c. 535 (NTUF); Shenshan-Chienching, Hosakawa 5222 (TAI); Chinshuiying, Chung & Tsang s.n. Oct. 28, 1951 (TAIF), Kueihu, Mori s.n. Jun. 1921 (TAIF), Hsu 3267 (TAI).
HUALIEN: Lienhuachih, Chang s.n. Jun. 16, 1982 (PPI), Liao s.n. Oct. 20, 1973 (TCF), Mori s.n. Jul. 8, 1936 (TAI); Sasaki s.n . Aug. 19, 1929 (TAI).
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Stolons: absent

Stipules: caducous

Stipules: shape: ovate, narrowly ovate

Stipules: apex: acuminate

Stipules: margin: entire

Stipules: length (mm): 28 mm

Stipules: width (mm): 18 mm

Stipules: indumentum: villous

Leaves: shape: broadly ovate, palmately divided

Leaves: margin: denticulate, serrulate

Leaves: length (cm): 7-31 cm

Leaves: width (cm): 6-27 cm

Leaves: indumentum: villous, densely scabrous

Venation: palmate

Veins: number: 7-9

Petioles: length (cm): 6-27 cm

Petioles: diameter (mm): 8 mm

Bracts: caducous

Bracts: shape: ovate

Bracts: apex: acute

Bracts: margin: ciliate

Bracts: length (mm): 7-15 mm

Bracts: width (mm): 4-8 mm

Bracts: indumentum: rusty villose

Inflorescence: length (cm): 9-24 cm

Peduncles:: erect

Peduncles: length (cm): 6-16 cm

Peduncles: diameter (mm): 4 mm

Flowers: color: white, pinkish, purplish

Male flower petals: number: four

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

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

Outer 2 tepals of male flowers: width (mm): 9-24 mm

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

Inner 2 tepals of male flowers: length (mm): 9-24 mm

Inner 2 tepals of male flowers: width (mm): 5-9 mm

Stamens: number: 116-187

Stamens: shape: golf-club shaped

Anthers: shape: narrowly obovoid

Anthers: length (mm): 1.9-2.3 mm

Anthers: diameter (mm): 0.9-1.2 mm

Filaments: shorter than anthers, equal to anthers

Filaments: length (mm): 0.8-2.4 mm

Female flower tepals: number: five, six

Female flower tepals: equality of size: unequal

The largest tepals of female flowers: shape:: orbicular

The largest tepals of female flowers: length (mm): 9-24 mm

The largest tepals of female flowers: width (mm): 8-22 mm

The smallest tepals of female flowers: shape: oblanceolate

The smallest tepals of female flowers: length (mm): 8-21 mm

The smallest tepals of female flowers: width (mm): 4-9 mm

Styles: number: two

Styles: length (mm): 4.9-5.6 mm

Locules number: two

Fruits: typ: capsule

Fruits: wings: 3-winged

Abaxil wing of fruits: length (mm): 15-32 mm

Abaxil wing of fruits: width (mm): 7-14 mm

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

Lateral wings of fruits: width (mm): 6-13 mm

Seeds: shape: broadly ellipsoid

Seeds: length (mm): 0.31-0.35 mm

Seeds: diameter (mm): 0.19-0.22 mm

Seed apex: shape: rotund

Seed micropylar end: constricted

Chrosome numer 2n=: 22

Elevation (m): 600-2100 m

Distribution: Taipei, Ilan, Taichung, Nantou, Chiayi, Kaohsiung, Pingtung, Taitung, Hualien

Plant: growth form: terrestrial, epipetric

Phenology: evergreen

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