Scientific name: Begonia abbreviata C.-I PengEnglish name: Vietnamese name: Thu hải đường cuống ngắnOther name:
Herbs perennial, monoecious. Rhizomes green or reddish, terete, 6-8 mm across, to 10 cm or longer, creeping, appressed reddish pubescent, internodes1-4 cm long. Stipules triangular, 1.3-1.8 cm long, ca. 7 mm wide, puberulent, apex acuminate and cuspidate, cusp 3 mm long, margin entire. Leaves alternate; petiole 2-5 cm long, 3-4 mm across, appressed pubescent; leaf blade ovate to broadly ovate, apex acute to mucronulate, base obliquely cordate, margin entire, 6-17 cm long, 5-12 cm wide; adaxially green or with many silver white patches in intercostal regions; patches elliptic, to 8 mm long, 5 mm wide, minutely puberulent; abaxially reddish tomentulose on red veins and veinlets; primary veins palmate, dichotomous, veinlets reticulate. Inflorescence unisexual or bisexual, in cymosely branching panicle, protogynous, axillary and terminal on the rhizome, erect, reddish, subglabrous, peduncles 0.5-1.5 cm long; female inflorescence 1-3-flowered, male inflorescence single or branched, flowers 5-30. Flowers scented. Bracts reddish, persistent, narrowly ovate at base of inflorescence, ca. 13-18 mm long,6 mm wide, apex acute, margin ciliate; widely ovate at summit of inflorescence (with staminate flowers), 6-8 mm long, ca. 6 mm wide, margin ciliate. Staminate flower: pedicel 2.5-3 cm long, tepals 4, outer 2 white or pinkish, with apparent red veins, orbicular to ovate, 1.2-1.5 cm long, 1-1.2 cm wide, margin entire, abaxially sparsely reddish-scabrescent or subglabrous; inner 2 white or pinkish, oblanceolate, apex round, base cuneate, 0.9-1.2 cm long, ca. 3 mm wide, glabrous; androecium actinomorphic, stamens 40-52, yellow, filaments free, ca. 0.7 mm long, anthers ca. 1 mm long. Carpellate flower: pedicel 0.5-1 cm long, tepals 5, white or pinkish, with apparent red veins, suborbicular to narrowly oblanceolate, outer 3 suborbicular to broadly obovate, ca. 1 cm long, 0.7-1 cm wide, abaxially sparsely reddish-scabrescent; inner 2 unequal, obovate to narrowly so, ca. 1 cm long, 3-6 mm wide, glabrous; ovary trigonous-ellipsoid, sparsely reddish hirsute, 3-locular, 3-winged, wings subequal, ca.5 mm tall, placentation axile; styles 3, ca. 5 mm long, each forked at middle, stigmatic band spiralled. Capsule trigonous-ellipsoid, 0.9-1.6 cm long, 5-8 mm across, wings trapeziform with rounded tips and entire margin, 5-7 mm tall.
Ecology and distribution
Endemic to northern Vietnam, Quang Tri Province