黄花秋海棠 huang hua qiu hai tang

Herbs, rhizomatous. Rhizomes creeping. Stem erect, 20-30 cm, brown tomentose when young. Leaves basal and cauline; stipules lanceolate, caducous; petiole to 20 cm, brown tomentose when young; blade ovate, asymmetric, 10-23 × 7-18 cm, rugose, pilose, brown tomentose on veins, venation palmate, base obliquely cordate, margin denticulate, shallowly lobed to distinctly divided; lobes triangular, 1-5 cm, apex long acuminate or acuminate. Inflorescences with 3-6 flowers; peduncle to 11 cm, brown tomentose; bracts caducous, deep red, oblong, 2-3 cm, glabrous. Staminate flowers: tepals 4, yellowish to deep yellow, outer 2 ovate, 1.5-2 cm, adaxially pilose, apex acute, inner 2 elliptic, 1-1.5 cm, apex acute; stamens numerous; anthers oblong, 1.2-2 mm; ovary trigonous, pilose, unequally 3-winged. Fruit not seen.

Forests, shaded moist environments; 1600-2600 m. Xizang, Yunnan [Bhutan, NE India, Myanmar].

This species resembles Begonia palmata but differs by its yellow tepals.