形态特征：攀援灌木，长达2米，茎、叶柄和花序疏被柔毛。
Description: Scandent subshrubs, to 2 m tall, stems, petioles , and inflorescences thin pubescent, glabrescent.
雄蕊露出或几乎不露出，花药紫黑色，花丝下部密被白色短柔毛，花柱伸出，长过雄蕊，基部密被柔毛。
Stamen is shown or show scarcely, antheral violet black, filament bottom is close by white short fluff, style is extended, had grown stamen, base the ministry is close by fluff.
小枝和花序轴疏生短柔毛或者被微柔毛。
Branchlets and inflorescence rachis sparsely pubescent or puberulent.
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