1.Inflorescences pedunculate, capitate, surrounded by a campanulate involucre, several flowered.
花序有花序梗，头状，被一钟状的总苞，数朵花包围。
2.Male inflorescences axillary, spicate, many-flowered, shortly pedunculate.
雄花序腋生，穗状，多花的的，有短花序梗。
3.veins pinnate. Male inflorescences discoid, fleshy, many-flowered, without interfloral bracteoles, pedunculate.
羽状脉雄花序盘状，肉质，多花的的，没有花内小苞片，有花序梗。
4.lateral branches often continuing to form a monochasium, heads numerous, short-pedunculate.
侧枝通常延伸至形成单歧聚伞花序，头状花序多数，有短花序梗。
5.Leaves opposite. Corymbs short pedunculate or sessile, axillary, often fascicled.
叶对生伞房花序短的有花序梗或者无柄，腋生，经常是簇生。
6.Inflorescences pedunculate capitula; middle part of calyx tube persistent and beak like at apex of fruit.
花序有花序梗头状；萼筒中部果的宿存和喙状在先端。
7.Leaf venation pinnate; floral units pedunculate, in a dichasium (tribe Lophostemoneae).
叶脉羽状；花单位有花序梗，在一二歧聚伞花序（族）。
8.Inflorescences terminal, often on short lateral branches, densely shortly racemose, (8-)12-flowered, pedunculate.
花序顶生，通常在短侧枝上，密被短总状，（8-）12花，有花序梗。
9.Flowers not pedunculate, bisexual.
花不有花序梗，两性。
10.Female inflorescences 1-flowered, sessile or pedunculate.
雌花序1花，无梗或有花序梗。