Begonia baviensis Gagnep.

Begonia baviensis resembles B. purpureofolia but differs in having green leaves with stiff hairs.

Herbs, rhizomatous, erect, ca. 50 cm tall or more. Rhizomes elongate, to 12 cm in diam. Stems 3-6 mm in diam., scabrous, densely rusty hirsute. Leaves basal and cauline; stipules caducous, triangular, 1.5-2 cm, brown villous; petiole 4-7(-11) cm, densely rusty villous; blade oblate-orbicular or suborbicular, asymmetric, 15-20 × 12-24 cm, both surfaces sparsely red hirsute, more densely so on veins, venation palmate, 6- or 7-veined, base oblique, shallowly cordate, margin remotely denticulate, shallowly lobed to distinctly lobed; lobes 5-7, triangular-ovate to ovate-lanceolate, apex acuminate. Inflorescences densely brown villous; peduncle 10-15 cm; bracts triangular, 5-6 × 4-5 mm, both surfaces and margin villous, apex caudate. Staminate flowers: tepals 4, outer 2 broadly ovate, ca. 1.7 × 1-1.2 cm, outside rusty villous, inner 2 obcordate, ca. 2 × 2 cm, glabrous; stamens numerous; anthers linear; connective extended, acute. Pistillate flowers: tepals 5, unequal, ovate, 1.2-2 cm, abaxially villous; ovary rusty villous, 2-loculed; placentae axile, bilamellate or 4-cleft; styles 2, free; stigmas 2-cleft, spiraled. Capsule nodding, 1.5-1.8 cm × 7-9 mm, rusty villous, unequally 3-winged; abaxial wing oblate-triangular, hirsute, apex obtuse; lateral wings lunate. Fl. Apr.

Guangxi, Yunnan (Jinping) [Vietnam].

Forests, shaded moist environments along streams; 400-500 m.

Begonia baviensis est une espèce de plantes de la famille des Begoniaceae. L'espèce fait partie de la section Platycentrum. Elle a été décrite en 1919 par François Gagnepain (1866-1952).

Begonia baviensis adalah spesies tumbuhan yang tergolong ke dalam famili Begoniaceae. Spesies ini juga merupakan bagian dari ordo Cucurbitales.

Nama ilmiah spesies ini pertama kali diterbitkan oleh François Gagnepain pada 1919.

Thu hải đường Ba Vì (danh pháp: Begonia baviensis) là một loài thực vật có hoa trong họ Thu hải đường. Loài này được Gagnep. miêu tả khoa học đầu tiên năm 1919.

金平秋海棠（学名：Begonia baviensis）为秋海棠科秋海棠属的植物，是中国的特有植物。分布在越南以及中国大陆的云南等地，多生长在山谷阴湿水边及密林下阴湿处，目前已由人工引种栽培。