Plant terrestrial; evergreen; with very short rhizomes from which upright stems arise, monoecious. Stems purple-red, 45-190 cm long, 37 mm across, glabrous.
Rhizomes to ___ cm long, to mm across, glabrous.
Stipules caducous, narrowly ovate to ovate, apex acuminate to cuspidate, margins entire, to 29 mm long, 20 mm wide, glabrous.
Leaves many, all cauline, dark green above, sometimes with dense, irregularly distributed white-spotted, purple-red beneath, herbaceous, asymmetric, lamceolate to narrowly ovate, undivided, apex acuminate to cuspidate, base cordate, margins irregularly denticulate or serrulate, 9-33 cm long, 5-14 cm wide, remotely scaberulous on both surface; venation palmate-pinnate; petioles purple-red, 6-26 mm long, 5 mm across, glabrous.
Inflorescences arise from stem, 6-13 cm long, glabrous; peduncles (inflorescence axis) to 9 cm long, 3 mm across, ascending to pendent.
Bracts caducous, narrowly ovate, apex acuminate, margins entire, to 24 mm long, 15 mm wide, glabrous.
Flowers of both sexes pinkish or sometimes white, glabrous.
Staminate flowers: tepals 4, outer two obovate to very broadly obovate, 7-15 mm long, 6-13 mm wide, inner two oblanceolate to narrowly obovate, 6-14 mm long, 5-11 mm wide; androecium actinomorphic; stemans 64-89, golf-club shaped, yellow, filaments free, 1.2-1.9 mm long; anthers narrowly oblong, 1.9-2.2 mm long, 0.6-0.7 mm across.
Pistillate flowers: tepals 5(-6), narrowly obovate to broadly obovate, unequal, the largest 8-14 mm long, 7-13 mm wide, the smallest 7-12 mm long, 3-7 mm wide; ovary (color) when blooming, inferior, glabrous; styles 3, yellow, free, forked once, 4.7-5.4 mm long; stigmas in a band and spiraled.
Fruits capsular, dehiscence, pendent, trigonous, unequally 3-winged, abaxial wing triangular, 16-22 mm long, 15-22 mm wide, lateral wings 4-6 mm long, 15-21 mm wide; locules 3, axile placentation, placental branches 2 per locule.
NANTOU: Fenghuangshan, Ou 2170 (Holotype, TCF); Chito, Peng 10507 (HAST), Chen 742 (HAST); Hoshe Giant Tree, Peng & Chen 10986 (HAST); Hoshe-Tungpu, Peng & Chen 10951, (HAST).
CHIAYI: Lungmei-Tsaoshan, Peng et al.10077 (HAST), Chen 310, 311 (HAST); Chiaoliping-Juili, Yang 3512 (TAI).
Stipules: shape: ovate, narrowly obovate
Stipules: apex: acuminate, cuspidate
Stipules: margin: entire
Stipules: length (mm): 29 mm
Stipules: width (mm): 20 mm
Stipules: indumentum: glabrous
Leaves: shape: lanceolate, narrowly ovate
Leaves: apex: acuminate, cuspidate
Leaves: margin: denticulate, serrulate
Leaves: length (cm): 9-33 cm
Leaves: width (cm): 5-14 cm
Leaves: indumentum: scaberulous
Petioles: length (cm): 6-26 cm
Petioles: diameter (mm): 5 mm
Petioles: indumentum: glabrous
Bracts: shape: ovate
Bracts: apex: acuminate
Bracts: margin: entire
Bracts: length (mm): 24 mm
Bracts: width (mm): 15 mm
Bracts: indumentum: glabrous
Inflorescence: length (cm): 6-13 cm
Peduncles: length (cm): 4-9 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): 7-15 mm
Outer 2 tepals of male flowers: width (mm): 6-13 mm
Inner 2 tepals of male flowers: shape: oblanceolate, narrowly obovate
Inner 2 tepals of male flowers: length (mm): 6-14 mm
Inner 2 tepals of male flowers: width (mm): 5-11 mm
Stamens: number: 64-89
Stamens: shape: golf-club shaped
Anthers: shape: broadly oblong
Anthers: length (mm): 1.9-2.2 mm
Anthers: diameter (mm): 0.6-0.7 mm
Filaments: shorter than anthers
Filaments: length (mm): 1.2-1.9 mm
Female flower tepals: number: five, six
Female flower tepals: equality of size: unequal
The largest tepals of female flowers: shape:: broadly obovate
The largest tepals of female flowers: length (mm): 8-14 mm
The largest tepals of female flowers: width (mm): 7-13 mm
The smallest tepals of female flowers: shape: obovate, narrowly obovate
The smallest tepals of female flowers: length (mm): 7-12 mm
The smallest tepals of female flowers: width (mm): 3-7 mm
Styles: number: three
Styles: length (mm): 4.7-5.4 mm
Locules number: three
Fruits: typ: capsule
Fruits: wings: 3-winged
Abaxil wing of fruits: shape: triangular
Abaxil wing of fruits: length (mm): 16-22 mm
Abaxil wing of fruits: width (mm): 15-22 mm
Lateral wings of fruits: length (mm): 4-6 mm
Lateral wings of fruits: width (mm): 15-21 mm
Seeds: shape: broadly ellipsoid
Seeds: length (mm): 0.27-0.29 mm
Seeds: diameter (mm): 0.2-0.22 mm
Seed apex: shape: rotund
Seed micropylar end: constricted
Elevation (m): 700-1600 m
Distribution: Nantou, Chiayi
Plant: growth form: terrestrial
Stems: habit: with very short(or without) rhizomes from which upright stem arise