Cytokinesis of microspore mother cells during meiosis was simultaneous type, and pollen grains were 2-cell, it suggested that the Dioscoreaceae was rather primitive in Angiosperm.

• 同时型胞质分裂和2-细胞型花粉证实了小花盾叶薯蓣所在薯蓣科是较原始的被子植物;