Petiole terete ; leaves yellowish green or glaucous abaxially .

叶柄圆柱状；叶黄绿色或有白霜背面。

Branchlets terete or angular and grooved .

小枝圆柱状或者角和被开槽。

Ovary short terete ; ovules in several rows .

子房短圆柱状；在数个排的胚珠。

Fruit parted into schizocarps ; leaf axis terete .

进分果深裂的果；叶轴圆柱状。

Heads terminal or axillary , globose or terete .

头状花序顶生或腋生，球状的或圆柱状。