| Noun | 1. | Helwingia - deciduous dioecious shrubs native to woodland thickets in low mountains in Japan rosid dicot genus - a genus of dicotyledonous plants Cornaceae, dogwood family, family Cornaceae - a rosid dicot family of the order Umbellales including: genera Aucuba, Cornus, Corokia, Curtisia, Griselinia, Helwingia |