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Compatible with

Scientific name: Begonia sphenantheroides C.-I Peng
English name:
Vietnamese name:
Other name:


Herbs monoecious, perennial, erect, 50-150 cm tall. Rhizomes congested, 15-25 mm across, to 9 cm long; erect stem stout, 5-20 mm across, internodes 7-30 cm, glabrous. Stipules caducous, triangular or narrowly so, apex aristate or apiculate, margin entire, glabrous. Leaves alternate, petiole to 20-30 cm long, glabrescent (puberulent when young); leaf blade herbaceous, asymmetric, ovate to broadly ovate, 21-41 cm long, 15-28 cm wide, glabrous or subglabrous, base obliquely cordate, margin irregularly loosely serrulate or denticulate; apex acute or short acuminate; venation 7- or 8- palmate. Inflorescences 2-3 (-7)-flowered, protandrous; peduncle 1-5 cm long, scaberulous; bracts deciduous, narrowly ovate to lanceolate, apex acuminate, margin entire, 0.9-1.8 cm long, subglabrous. Staminate flower: pedicel 0.7-1.5 cm long, scabrous; tepals 4, outer 2 reddish, oblong, ovate or orbicular, 0.8-1.9 cm long, 0.5-1.5 cm wide, abaxially scabrous, inner 2 pinkish, broadly oblanceolate to oblong, 0.5-1.7 cm long, 0.3-0.9 cm wide, glabrous; androecium actinomorphic, subglobose, 0.7 cm across, stamens 70-120, yellow, clavate; filaments 0.7-2 mm long, fused to a short central column; anthers 1.5-1.8 mm long, apex truncate. Carpellate flower: pedicel 1.5-2.2 cm long, scabrous; ovary green, unequally 3-winged, wings red, scabrous, 2-locular; placentae axile, bilamellate; tepals 5, reddish, unequal, elliptic to obovate, 0.9-1.8 cm long, 0.5-1.5 cm wide, apex obtuse, abaxially scabrous; styles 2, ca. 5 mm long, 2-cleft, fused at base, stigmatic band wavy-twisted and spiralled. Capsule nodding, unequally 3-winged, abaxial wing falcate, 5-16 mm tall, ca. 7 mm wide, lateral wings triangular or narrowly so, 3-6 mm tall.

Ecology and distribution

Begonia sphenantheroides C.-I Peng is distributed in limestone areas in Ha Giang Province and Tuyen Quang Province, northeastern Vietnam. This species grow on semishaded to shady, moist, mossy rocky slopes in broadleafed forest.


Begonia sphenantheroides C.-I Peng (1) on Phytotaxa 222(2)083-099.jpg at www.BotanyVN.com

Photo 1. Begonia sphenantheroides C.-I Peng (1) on Phytotaxa 222(2)083-099.jpg


Begonia sphenantheroides C.-I Peng (2) on Phytotaxa 222(2)083-099.jpg at www.BotanyVN.com

Photo 2. Begonia sphenantheroides C.-I Peng (2) on Phytotaxa 222(2)083-099.jpg


Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Cucurbitales
Familia: Begoniaceae
Genus: Begonia


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