Stipules when present intrapetiolar, distinct, setaceous, caducous.

托叶当存在时生叶柄内，离生，具，落。

Hypanthium obconic, campanulate, or cyathiform, caducous at fruiting time, only annular base remained.

托杯倒圆锥形，钟状，或杯状，落的在果期的时，环形的基础剩下。

Calyx lobes 4 or 5 or rarely more, usually short, caducous or persistent, apex usually obtuse, rarely connate and then calyptrate.

萼裂片4或5或很少更多，通常短，落或宿存，先端通常钝的，很少合生然后具帽状的。