Byttneria pilosa Roxb.

Woody climbing lianas. Branchlets dark brown when dry, stellate hairy, glabrescent. Stipules linear, ca. 14 mm, caducous; petiole 12-15 cm, hairy; leaf blade orbicular or cordate, usually 3-5-lobed, 14-24 × 13-21 cm, both surfaces yellowish brown stellate puberulent and hirsute, denser abaxially, basal veins 7, base cordate, margin serrulate, apex obtuse or acute. Inflorescence a flat-topped cyme, axillary, few-flowered. Pedicels slender, ca. 2.5 mm. Sepals ca. 3 mm, abaxially hairy, adaxially glabrous. Petals 4-lobed, lobes obtuse. Staminodes partly connate, ca. 1.5 cm. Ovary globose, verrucose. Capsule yellowish pink, globose, ca. 2 cm in diam., densely spiny, spines branched and soft, 4-6 mm. Seed yellow with brown mottling, ovoid, ca. 5 mm.

S Yunnan [Bangladesh, India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam].

Mixed forest margins; 500-1000 m.

Byttneria elegans Ridley; B. pilosa var. pellita Gagnepain.

Byttneria pilosa is a species of flowering plants in the family Malvaceae. It is found in Asia (Bangladesh, Burma, China (Yunnan), India, Laos, Thailand and Vietnam).

Byttneria pilosa là một loài thực vật có hoa trong họ Cẩm quỳ. Loài này được Roxb. mô tả khoa học đầu tiên năm 1824.

粗毛刺果藤（学名：Byttneria pilosa）为梧桐科刺果藤属下的一个种。