All Floras      Advanced Search
Flora of Taiwan Login | eFloras Home | Help
Flora of Taiwan | Family List | Begoniaceae | Begonia

Begonia lukuana Liu & Ou, Bull. Exp. Forest Natl. Chung Hsing Univ. 4: 6. 1982; Chen, Fl. Taiwan 2nd Ed. 3: 851. 1993.


Begonia lukuana

Credit: Ching-I Peng

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).

Stolons: absent

Stipules: caducous

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

Venation: palmate-pinnate

Petioles: length (cm): 6-26 cm

Petioles: diameter (mm): 5 mm

Petioles: indumentum: glabrous

Bracts: caducous

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:: pendulous

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

Phenology: evergreen

Stems: habit: with very short(or without) rhizomes from which upright stem arise


Related Objects Image Gallery 
  • Image/JPEG (Ching-I Peng)
  • Image/JPEG
  • Image/JPEG (Ching-I Peng)
  • Image/JPEG
  • Image/JPEG (Ching-I Peng)
  • Image/JPEG

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |