Dioscorea exalata C. T. Ting & M. C. Chang

Tubers ovoid or cylindric; cork drying brown; transverse section white. Stem twining to right, green or purplish red, glabrous. Leaves alternate basally on stem, opposite distally on stem, simple; leaf blade abaxially purplish red along veins, ovate to long elliptic-ovate, 6--16 × 4--14 cm, glabrous, basal veins 7 or 9, base sagittate or hastate to cordate with basal lobes bluntly angular, apex acute, acuminate, or caudate. Male spikes solitary or a few together, 2--3 cm, borne along paniclelike, lateral branches to 30 cm; rachis obviously zigzagged. Male flowers: sessile; outer perianth lobes elliptic-ovate, apex obtuse, inner ones spatulate; stamens 6. Female spikes solitary or paired. Female flowers: outer perianth lobes broadly ovate, inner ones elliptic. Capsule not reflexed, oblate, 1.5--2.5 cm; wings 1.7--2.3 cm wide. Seeds inserted near middle of capsule, winged all round.

Guangdong, Guangxi, Guizhou, Sichuan, Yunnan [Thailand, Vietnam].

Mixed forests, broad-leaved forests, bamboo forests, mountain slopes, valleys, roadsides; 1000--2400 m.

Dioscorea exalata là một loài thực vật có hoa trong họ Dioscoreaceae. Loài này được C.T.Ting & M.C.Chang mô tả khoa học đầu tiên năm 1982.

无翅参薯（学名：Dioscorea exalata）为薯蓣科薯蓣属的植物，为中国的特有植物。分布在中国大陆的贵州、广西、广东、四川、云南等地，生长于海拔1,000米至2,400米的地区，一般生长在竹林、山坡、山沟、路边的阔叶林或乔灌木混交林中，目前尚未由人工引种栽培。