Plant epipetric or terrestrial; evergreen; with long creeping rhizomes from which upright stems arise, monoecious. Stems to 35-95 cm long, 17 mm across, glabrous. Rhizomes to ___ cm long, to 19 mm across, glabrous. Stipules caducous, ovate to very broadly ovate, apex mucronate to acuminate, margins entire, to 27 mm long, 21 mm wide, glabrous. Leaves many, basal and cauline, herbaceous, asymmetric, ovate to broadly ovate, shallowly lobed to nearly lobeless, divided 1/3 of leaf length, apex acuminate to caudate, base cordate, margins irregularly denticulate or serrulate, ___ cm to ___ cm long, 9-37 cm wide, remotely scaberulous and often with white spots adaxially, sparsely scaberulous abaxially; venation palmate; petioles, 7-43 cm long, to 11 mm across, glabrous or sometimes remotely pilose. Inflorescences arise from stem, 6-13 cm long, glabrous; peduncles (inflorescence axis) to 23? cm long, 4 mm across, erect. Bracts caducous, triangular or broadly ovate, apex acute to apiculate, margins entire, to 21 mm long, 15 mm wide, glabrous. Flowers of both sexes pinkish or sometimes white, glabrous. Staminate flowers: tepals 4, outer two obovate to orbicular, 12-26 mm long, 11-25 mm wide, inner two oblanceolate to narrowly obovate, 11-23 mm long, 5-12 mm wide; androecium actinomorphic; stemans 82-124, golf-club shaped, yellow, filaments free, 1.9-3.1 mm long; anthers narrowly obovoid, 1.8-2.2 mm long, 0.9-1.2 mm across. Pistillate flowers: tepals 5-6(-8), narrowly obovate to broadly obovate, unequal, the largest 11-26 mm long, 9-24 mm wide, the smallest 10-23 mm long, 5-11 mm wide; ovary pale green when blooming, glabrous; styles 2, yellow, free, forked once, 4.8-5.5 mm long; stigmas in a band and spiraled. Fruits capsular, dehiscence, nodding, trigonous, unequally 3-winged, abaxial wing nearly triangular, 10-23 mm long, 12-18 mm wide, lateral wings 4-6 mm long, 11-16 mm wide; locules 2, axile placentation, placental branches 2 per locule.

TAIPEI: Chinkualiang, Chen 105 (HAST), Sasaki s.n. Mar., 1918 (TAIF); Shihting-Huangtitien, Hsu & Lin 39 (HAST), Peng 8553 (HAST); Huangtitien, Peng 4998 (HAST), Wang 3403 (TAI); Shihting, Hsu 3233 (TAI); Sasaki s.n. Aug. 1913 (TAI), Suzuki s.n. Sep. 21, 1930; Wulai-Wawaku, Ou 9447 (TCF), Peng 4972, 4973 (HAST); Wulai, Chuang 17352 (PPI), Peng 8369, 9999 (HAST), Kuo 6745 (TAI), Chuang 2306 (TAI), Kudo s.n. Feb. 2, 1962, Matuda s.n. Jul. 24, 1981 (TAIF); Wawaku, Tang 994 (TAI), Pai & Wang 101 (TAI); Wulai-Ayu, Suzuki 5451 (TAI); Ayu, Suzuki s.n. Oct. 23, 1932 (TAI); Tatunshan, Chen 99 (HAST); Tatunshan-Peito, Hsu 5468 (TAI), Tatunshan-Chingho, Hsu 5573; Peito, Kawakami & Shimada s.n. Aug., 1910 (TAIF), Shimada s.n. Dec. 13, 1914 (TAIF); Shihlien, Shimada s.n. Dec. 13, 1914 (TAIF); Muchihshan, Peng 11148 (HAST), Nakamura 479 (TAI), Suzuki s.n. Oct. 12, 1932 (TAI), Kiyomizu 464 (TAI); Matsao-Tayukeng, Chen 665 (HAST); Yangmingshan, Huang 9726 (TAI), Sasaki s.n. Oct. 3, 1910 (TAIF); Yunhsien Holiday Resort, Kuo 9870 (TAI); Hsiangyii, Chen 302 (HAST); Kankou, Lin & Shen s.n. Sep. 24, 1933 (TAI); Menghuanhu, Kou 5523 (TAI); Chihsingshan, Lai 1530 (NTUF); Tatun-Hsiaohuanyinshan Saddle, Shimada 755 (TAI), Fushan-Hapen, Tang 59 (TAI), Chienshanhu, Ito s.n. May, 1951 (TAIF); Pingtingchuang, Shimada s.n. Aug. 1, 1951 (TAIF); Taipei, Suzuki 4351, 5451, 7363 (TAI); Huangtsuishan, Wang 2649 (TAI), Chiang 447 (TAI).
ILAN: Tsuifenghu-Tayuanshan, Peng 10341 (HAST); Tayuanshan, Suzuki 6279 (TAI), Kuo 178 (NTUF); Taipingshan, Chang 6721 (PPI), Suzuki s.n. Aug. 15, 1928, s.n. July 27, 1927 (TAI); Nanshan, Hsu 5767 (TAI); Lotung, S. C. s.n. Sep. 24, 1910 (TAIF); Chiaohsi, Ito s.n. May 11, 1951 (TAIF); Shenmihu, Hsu 567 (TAI); Pengpengshan, Kao 5956 (TAI); Meitan, Suzuki s.n. Jul. 10, 1932 (TAI).
TAOYUAN: Lalashan, Matuda s.n. Jul. 24, 1981, Jul. 27, 1918 (TAI); Peichatienshan, Peng 6818 (HAST), Chen 642 (HAST); Sankuan, Shimada s.n. Jun. 1918 (TAIF).
HSINCHOU: Hsitoushan, Ou 11161 (TCF), Su s.n. Apr. 18, 1971 (NTUF); Sanchia, Suzuki s.n. Sep. 21, 1930.
MIAOLI : Cholan, Tang 569 (TAI); Tahu, Kawakami s.n. Sep., 1910 (TAIF).
NANTO: Wushe, Sasaki s.n. Jul. 27, 1922 (TAIF).
CHIAYI: Juili, Ou 2885 (TCF); Fenchihu, Sasaki s.n. May 5, 1914 (TAI); Alishan, Sasaki s.n. May 5, 1913 (TAIF); Tapu, Sasaki s.n. Oct., 1917 (TAIF).
TAITUNG: Chinshuiying, Huang 362 (TAI), Fukuyama 3990 (TAI), Cheng s.n. Oct. 28, 1907 (TAI); Taiyuanhsiaku, Chen & Hu 427 (HAST); Kuanshanhungshih Logging Trail, Liu & Ou 2095 (TCF); Fengshan-Chiataishan, Yamamoto 100 (TAI); Peinanshan, Yamamoto s.n. Sep., 1928, s.n. Aug. 21, 1929, s.n. Aug. 4-11, 1931 (TAI); Yamamoto & Mori s.n. Jul. 24, 1938 (TAI).
HUALIEN: Fengshan, Peng 9904, 9905,9906, 9907, 9908, 9909 (HAST), Lu & Ou 1790 (TCF), Huang 4253 (TAI) ; Tailuko, Chang s.n. Aug. 1957 (PPI); Fuyuan Butterfly Valley, Peng & Chen 11650 (HAST); Tungmen, Sasaki s.n. Aug. 19, 1929 (TAI); Hungyeh Hot Spring, Peng & Chen 11623 (HAST); Wangmushan, Ying 526 (NTUF); Tzuyun Bridge, Lu & Ou 1208; Chingshuishan, Nakamuna 3829 (TAI); Nanhutashan-Nanshan, Yamazaki 1123 (TAI); Tailuko-Tali, Chen 171 (HAST); Hualien Harbor, Sasaki s.n. Aug. 20, 1929 (TAI); Ying 1351 (NTUF).

Stolons: absent

Stipules: caducous

Stipules: shape: ovate, broadly ovate

Stipules: apex: acuminate

Stipules: margin: entire

Stipules: length (mm): 27 mm

Stipules: width (mm): 21 mm

Stipules: indumentum: glabrous

Leaves: shape: ovate, broadly ovate, palmately divided

Leaves: apex: acuminate, cuspidate

Leaves: margin: denticulate, serrulate

Leaves: width (cm): 9-37 cm

Leaves: indumentum: scaberulous

Venation: palmate

Petioles: length (cm): 7-43 cm

Petioles: diameter (mm): 11 mm

Petioles: indumentum: glabrous, pilose

Bracts: caducous

Bracts: shape: broadly ovate, triangular

Bracts: apex: acute, apiculate

Bracts: margin: entire

Bracts: length (mm): 21 mm

Bracts: width (mm): 15 mm

Bracts: indumentum: glabrous

Peduncles:: erect

Peduncles: length (cm): 23 cm

Peduncles: diameter (mm): 4 mm

Flowers: color: white, pinkish

Male flower petals: number: four

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

Outer 2 tepals of male flowers: length (mm): 12-26 mm

Outer 2 tepals of male flowers: width (mm): 11-25 mm

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

Inner 2 tepals of male flowers: length (mm): 11-23 mm

Inner 2 tepals of male flowers: width (mm): 5-12 mm

Stamens: number: 82-124

Stamens: shape: golf-club shaped

Anthers: shape: narrowly obovoid

Anthers: length (mm): 1.8-2.2 mm

Anthers: diameter (mm): 0.9-1.2 mm

Filaments: length (mm): 1.9-3.1 mm

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

Female flower tepals: equality of size: equal, subequal

The largest tepals of female flowers: length (mm): 11-26 mm

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

The smallest tepals of female flowers: length (mm): 10-23 mm

The smallest tepals of female flowers: width (mm): 5-11 mm

Styles: number: two

Styles: length (mm): 4.5-5.5 mm

Locules number: two

Fruits: typ: capsule

Fruits: wings: 3-winged

Abaxil wing of fruits: shape: triangular

Abaxil wing of fruits: length (mm): 10-23 mm

Abaxil wing of fruits: width (mm): 12-18 mm

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

Lateral wings of fruits: width (mm): 11-16 mm

Seeds: shape: broadly ellipsoid

Seeds: length (mm): 0.32-0.35 mm

Seeds: diameter (mm): 0.32-0.26 mm

Seed micropylar end: constricted

Chrosome numer 2n=: 60

Elevation (m): 75-2000 m

Distribution: Taipei, Taoyuan, Ilan, Hsinchu, Miaoli, Nantou, Taitung, Hualien

Plant: growth form: terrestrial, epipetric

Phenology: evergreen

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