Current year branchlets terete or 2- or 4-ribbed. Anthers not locellate. Ovary glabrous, with 5-10 or rarely more ovules per locule; style 0.5-4 mm.

• 当年小枝圆柱状的或2-或4肋。花药不具分格；子房无毛，具或很少更多胚珠每室；花柱0.；5-4毫米