Leaf petiole more than 2 mm wide; involucral bract blade undivided or sometimes 3-lobed; cyme 1-flowered; sepals glabrous or sparsely puberulent; staminodes sometimes present.

• 叶柄超过2毫米宽；总苞片不裂或有时3浅裂；聚伞花序1花；萼片无毛的或疏生微柔毛；退化雄蕊有时宿存。(50