Plant terrestrial; evergreen; with very short rhizomes from which upright stems arise, monoecious.
Stems 40-200 cm long, to 46 mm across, glabrous.
Rhizomes ___cm long, ___ mm across, (hair).
Stipules caducous, narrowly ovate, apex acuminate to cuspidate, margins entire, to 27 mm long, 19 mm wide, glabrous.
Leaves many, all cauline, often with white spots adaxially, often reddish beneath, herbaceous, asymmetric, lanceolate, undivided, apex acuminate to to caudate, base shallowly cordate, margins irregularly denticulate or serrulate, 6-14 cm long, 1.5-4 cm wide, remotely scaberulous on both surfaces; venation palmate-pinnate; petiolesto 4 cm long, 4 mm across, glabrous.
Inflorescences arise from stem, 5-11 cm long, glabrous; peduncles (inflorescence axis) slender, to 7 cm long, 3 mm across, pendent.
Bracts caducous, narrowly triangular, apex acuminate, margins entire, to 21mm long, 9 mm wide, glabrous.
Flowers of both sexes pinkish or sometimes white, glabrous.
Staminate flowers: tepals 4, outer two obovate to very broadly obovate, 9-18 mm long, 8-17 mm wide, inner two oblanceolate to narrowly obovate, 8-16 mm long, 4-8 mm wide; androecium actinomorphic; stemans 64-91, golf-club shaped, yellow, filaments free, 1..6-2.4 mm long; anthers very narrowly obovoid, 1.9-2.3 mm long, 0.7-0.9 mm across.
Pistillate flowers: tepals 5(-6), narrowly obovate to orbicular, unequal, the largest 8-16 mm long, 7-14 mm wide, the smallest 7-15 mm long, 4-8 mm wide; ovary (color) when blooming, inferior, glabrous; styles 3, yellow, free, forked once, 4.5-5.1 mm long; stigmas in a band and spiraled.
Fruits capsular, dehiscence, pendent, trigonous, unequally 3-winged, abaxial wing triangular, 12-18 mm long, 10-16 mm wide, lateral wings 4-5 mm long, 11-15 mm wide; locules 3, axile placentation, placental branches 2 per locule.
TAICHUNG: Tungshih Forest Station, Chen 392 (HAST).
NANTOU: Chitou, Chuang 4038 (TAI); Tungpu-Hoshe, Peng & Chen 10951 (HAST); Hoshe Giant Tree, Peng & Chen 10986 (HAST); Wuchieh, Liu 392 (TCF); Choshe, Mori 3429; Yushan, Kawakami & Mori 2046 (Syntype), 2048 (TAIF).
CHIAYI: Tsaoshan, Chen 309 (HAST), Peng 10078 (HAST); Chiehtung, Peng 9994 (HAST).
KAOHSIUNG: Tengchih, Chen & Peng 357, 359, 371 (HAST); Chen 544 (HAST), Yang 5919, 5950, 6013, 6046, 6113 (PPI), Ou 6834 (TCF); Shanping, Chen 103, 104, 523 (HAST), Feng s.n. Apr. 18, 1976 (PPI), Ou 2888 (TCF), Peng 10092, 10093 (HAST); Tona, Chen & Peng 378, 380 (HAST); Shanping-Nanfenshan, Kao 7426; Nanfenshan, Ou 3343 (TCF).
PINGTUNG: Nanjenshan, Chiu 313 (PPI); Kaoshihfo, Soma s. n. 1912 (TAI); Entrance to Peitawushan Chen 643, 673 (HAST); Tashulinshan, Matud s. n. 1919 (NTUF); Laiyi-shakanyalien, s. c. 1492 (NTUF).
TAITUNG: Fengshan-Chiataishan, Yamamoto & Mori 99, 149 (TAI).
Stolons: absent
Stipules: caducous
Stipules: shape: narrowly obovate
Stipules: apex: acuminate
Stipules: margin: entire
Stipules: length (mm): 27 mm
Stipules: width (mm): 19 mm
Stipules: indumentum: glabrous
Leaves: shape: lanceolate
Leaves: apex: acuminate, cuspidate
Leaves: margin: denticulate, serrulate
Leaves: length (cm): 6-14 cm
Leaves: width (cm): 1.5-4 cm
Leaves: indumentum: scaberulous
Venation: palmate-pinnate
Veins: number: 5-7
Petioles: length (cm): 4 cm
Petioles: diameter (mm): 4 mm
Petioles: indumentum: glabrous
Bracts: caducous
Bracts: shape: narrowly triangular
Bracts: apex: acuminate
Bracts: margin: entire
Bracts: length (mm): 21 mm
Bracts: width (mm): 9 mm
Bracts: indumentum: glabrous
Inflorescence: length (cm): 5-11 cm
Peduncles:: pendulous
Peduncles: length (cm): 3-7 cm
Peduncles: diameter (mm): 3 mm
Flowers: color: white, pinkish
Male flower petals: number: four
Outer 2 tepals of male flowers: shape: obovate, broadly obovate
Outer 2 tepals of male flowers: length (mm): 9-18 mm
Outer 2 tepals of male flowers: width (mm): 8-17 mm
Inner 2 tepals of male flowers: shape: oblanceolate, narrowly obovate
Inner 2 tepals of male flowers: length (mm): 8-16 mm
Inner 2 tepals of male flowers: width (mm): 4-8 mm
Stamens: number: 64-91
Stamens: shape: golf-club shaped
Anthers: length (mm): 1.9-2.3 mm
Anthers: diameter (mm): 0.7-0.9 mm
Filaments: length (mm): 1.6-2.4 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): 8-16 mm
The largest tepals of female flowers: width (mm): 7-14 mm
The smallest tepals of female flowers: shape: narrowly obovate
The smallest tepals of female flowers: length (mm): 7-15 mm
The smallest tepals of female flowers: width (mm): 4-8 mm
Styles: number: three
Styles: length (mm): 4.5-5.1 mm
Locules number: three
Fruits: typ: capsule
Fruits: wings: 3-winged
Abaxil wing of fruits: shape: triangular
Abaxil wing of fruits: length (mm): 12-18 mm
Abaxil wing of fruits: width (mm): 10-16 mm
Lateral wings of fruits: length (mm): 4-5 mm
Lateral wings of fruits: width (mm): 11-15 mm
Seeds: shape: broadly ellipsoid
Seeds: length (mm): 0.29-0.34 mm
Seeds: diameter (mm): 0.19-0.22 mm
Seed apex: shape: rotund
Seed micropylar end: constricted
Chrosome numer 2n=: 38
Elevation (m): 450-2300 m
Distribution: Taichung, Nantou, Chiayi, Kaohsiung, Pingtung, Taitung
Plant: growth form: terrestrial
Phenology: evergreen
Stems: habit: with long ascentant rhizomes from which upright stems arise
