Begonia palmata D. Don × B. taiwaniana Hayata
Plant terrestrial; evergreen; with very short rhizomes from which upright stems arise, monoecious. Stems 40-125 cm long, to 26 mm across, glabrous or sometimes remotely pilose. Rhizomes ___ cm long, ___ mm across, (hair). Stipules caducous, ovate to broadly ovate, apex acuminate, margins entire, to 23 mm long, 18 mm wide, glabrous. Leaves many, herbaceous, asymmetric, lanceolate to narrowly ovate, undivided, apex acuminate to cuspidate, base cordate, margins irregularly denticulate or serrulate, 8-22 cm long, 4-8 cm wide, densely scabrous or hirsute on both surfaces; venation palmate-pinnate; petioles 7-16 cm long, 5 mm across, rusty villose. Inflorescences arise from stem, 6-11 cm long, glabrous or sometimes pilose; peduncles (inflorescence axis) to 7 cm long, 2 mm across, erect to pendent. Bracts caducous, narrowly ovate to ovate, apex mucronate to acuminate, margins entire, to 24 mm long, 17 mm wide, glabrous. Flowers of both sexes pale pink, abaxial surfaces of outer tepals densely scabrous. Staminate flowers: tepals 4, never open, outer two obovate to orbicular, to 14 mm long, 13 mm wide, inner two oblanceolate to narrowly ovate, to 13 mm long, 6 mm wide; androecium actinomorphic; stamens to ca. 140, yellow, golf-club shaped, filaments free, 1.5-2.8 mm long, anthers narrowly obovoid, 1.8-2.2 mm long, 0.9-1.2 mm across. Pistillate flowers: tepals 5(-6), oblanceolate to orbicular, unequal to subequal, the largest 11-19 mm long, 9-18 mm wide, the smallest 9-17 mm long, 4-9 mm wide; ovary (color) when blooming, inferior, densely scabrous; styles (2-)3, yellow, free, forked once, 4.7-5.3 mm long; stigmas in a band and spiraled. Fruits capsular, dehiscence, pendent, (color), , to ___ mm long, ___ mm across; unequally 3-winged, abaxial wing triangular 12-19 mm long, 11-16 mm wide, lateral wings 4-6 mm long, 10-14 mm wide; locules (2-)3, axile placentation, placental branches 2 per locule.
CHIAYI: Fenchihu-Shihcho, Ying s. n. Jan. 16, 1988 (Holotype & Isotype of B. fenchihuensis Ying, NTUF).
PINGTUNG: Entrance to Peitawushan, Peng 10617, Chen 644, 662 (HAST), Lai 9819 (TAI); Peitawushan-Taiwu, Chen 671, 672 (HAST); Wuweishan, Matuda 7875, s.n. Dec. 30, 1918 (TAIF), Matuda 322 (Holotype, TAI); Laiyii, Lo 197 (TAIF).
KAOHSIUNG: Tienchih, Chen 363, 726 (HAST).
Stolons: absent
Stipules: caducous
Stipules: shape: ovate, broadly ovate
Stipules: apex: acuminate
Stipules: margin: entire
Stipules: length (mm): 23 mm
Stipules: width (mm): 18 mm
Stipules: indumentum: glabrous
Leaves: shape: lanceolate, narrowly ovate
Leaves: apex: acuminate
Leaves: margin: denticulate, serrulate
Leaves: length (cm): 8-22 cm
Leaves: width (cm): 4-8 cm
Leaves: indumentum: densely scabrous
Venation: palmate-pinnate
Veins: number: 5-8
Petioles: length (cm): 7-16 cm
Petioles: diameter (mm): 5 mm
Petioles: indumentum: densely rusty villose
Bracts: caducous
Bracts: shape: ovate
Bracts: apex: mucronate, acuminate
Bracts: margin: entire
Bracts: length (mm): 24 mm
Bracts: width (mm): 17 mm
Bracts: indumentum: glabrous
Inflorescence: length (cm): 6-11 cm
Peduncles:: pendulous
Peduncles: length (cm): 7 cm
Peduncles: diameter (mm): 2 mm
Flowers: color: pinkish
Male flower petals: number: four
Outer 2 tepals of male flowers: shape: orbicular, obovate
Outer 2 tepals of male flowers: length (mm): 14 mm
Outer 2 tepals of male flowers: width (mm): 13 mm
Inner 2 tepals of male flowers: shape: oblanceolate, narrowly ovate
Inner 2 tepals of male flowers: length (mm): 13 mm
Inner 2 tepals of male flowers: width (mm): 6 mm
Stamens: number: 140
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): 1.5-2.8 mm
Female flower tepals: number: five, six
Female flower tepals: equality of size: subequal, unequal
The largest tepals of female flowers: shape:: orbicular
The largest tepals of female flowers: length (mm): 11-19 mm
The largest tepals of female flowers: width (mm): 9-18 mm
The smallest tepals of female flowers: shape: oblanceolate
The smallest tepals of female flowers: length (mm): 11-19 mm
The smallest tepals of female flowers: width (mm): 9-18 mm
Styles: number: two, three
Styles: length (mm): 4.7-5.3 mm
Locules number: two, three
Fruits: wings: 3-winged
Abaxil wing of fruits: shape: triangular
Abaxil wing of fruits: length (mm): 12-19 mm
Abaxil wing of fruits: width (mm): 11-16 mm
Lateral wings of fruits: length (mm): 4-6 mm
Lateral wings of fruits: width (mm): 10-14 mm
Seeds: shape: broadly ellipsoid
Seeds: length (mm): 0.34-0.38 mm
Seeds: diameter (mm): 0.19-0.22 mm
Seed apex: shape: rotund
Seed micropylar end: constricted
Chrosome numer 2n=: 30
Elevation (m): 1000-1600 m
Distribution: Chiayi, Kaohsiung, Pingtung
Plant: growth form: terrestrial
Phenology: evergreen
Stems: habit: with long ascentant rhizomes from which upright stems arise
