Leaflets abaxially wholly tomentose or sericeous , sometimes glabrescent .

小叶背面的完全被绒毛或者被绢毛，有时脱落无毛。

Plants sparingly pubescent or glabrescent .

节约的植株具短柔毛或脱落无毛。

Leaves and young branches glabrescent , leaves oblong to oblong-lanceolate .

叶和幼枝后脱落，叶长圆形到长圆状披针形。

Leaf petiole glabrous ; leaf blade glabrescent on both surfaces or abaxially sparsely hispidulous on midvein .

叶柄无毛；叶片在两面上后脱落无毛或背面稀疏具短硬毛在中脉上。

Lianas to 5 m. young branchlets rusty pubescent , glabrescent and lenticellate with age .

藤本植物到5米幼枝锈色短柔毛，后脱落和具皮孔的老时。