Lianas stout, up to 8 metres long, the Yellow hirsute, base woody stems, having tuberous roots thick. Pinnately compound leaves 3-foliolate; stipules, ovate oblong, with lines; small stipules linear lanceolate, and petiolules equaling or longer; three leaflets lobed, occasionally entire, terminal leaflets broadly ovate or obliquely ovate, long 8-15 (19) cm, width of 5-12 (18) cm, apex long acuminate, lateral leaflets obliquely ovate, slightly smaller above is light yellow and procumbent vegetable pilose. The following is dense; Ye Bing was yellow and yellow. Pod long elliptic, 5-9 cm long, 8-11 mm wide, flat, brown hirsute. Flowering period 9-10 month, fruit period 11-12 month. Born in the grass slope or roadside and place a damp, or in an altitude of 1000-3200 meters in the ravine forest.
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