Begonia longistyla Y. M. Shui & W. H. Chen

Herbs, rhizomatous. Rhizomes 7-10 cm × 2-4 mm, sparsely hairy. Leaves all basal; stipules generally persistent, reflexed, triangular; petiole 3-5 cm, densely strigose; blade ovate, 6-10 × 4-6 cm, papery, rugose, abaxially densely hairy on veins, adaxially densely tuberculate based pilose-setulose, base obliquely deeply cordate, margin serrulate and ciliate, apex obtuse. Inflorescences with 20-40 flowers in a dichasial cyme; peduncle 4-8 cm, glabrous; bracts ovate, apex mucronate. Staminate flowers: pedicels 7-8 mm, glabrous; bracteoles ovate, 2-3 × 1-1.5 mm, apex obtuse; tepals 4, glabrous, outer 2 green, orbicular, 4-5 mm in diam., inner 2 greenish, obovate, 4.5-5 × 3-3.5 mm; stamens numerous; filaments fused up to half from base; anthers obovoid, 0.3-0.4 × 0.3-0.4 mm, apex emarginate. Pistillate flowers: tepals 3, glabrous; ovary coniform, 7-8 × 3-4 mm, glabrous, 3-winged, apex with beak 1.5-2 mm, 1-loculed with parietal placentation; styles 3, usually fused up to half from base. Capsule nodding, ovate, 6-7 × 3-4 mm, with 3 persistent styles; wings 3, subequal, lunate, glabrous. Fl. Feb-Jun, fr. from Apr-Jun.

Yunnan (Gejiu, Hekou).

● Limestone slopes in dense broad-leaved forests, at streamsides; 200-300 m.

Begonia longistyla est une espèce de plantes de la famille des Begoniaceae. Elle a été décrite en 2005 par Yu Min Shui et Wen Hong Chen.

Begonia longistyla 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 Yu Min Shui dan Wen Hong Chen pada 2005.

Begonia longistyla là một loài thực vật có hoa trong họ Thu hải đường. Loài này được Y.M.Shui & W.H.Chen mô tả khoa học đầu tiên năm 2005.