nucellus

1.The ovule is bitegminous and tenuinucellate.The archesporial cell locates under the nucellus epidermis, which develops into fuctional megasporocyte.

孢原细胞位于珠心表，直接起大孢子母细胞功能。

2.Simple ovary, the placentation is brink.The ovules are campylotropous.The ovule is bitegmic and crassinucellate.The megaspore archesporium is initiated from sub-epidermis of nucellus.

摘要矮沙冬青子房单心1室，边缘胎座，弯生胚珠，胚珠具双珠被、厚珠心。