archesporium

archesporium

1. A single archesporium differentiates immediately below the nucellar epidermis,it functions directly as the megaspore mother cell.

孢原细胞处于珠心表皮之下，直接起大孢子母细胞的功能。

2. The archesporial cells differentiated from single archesporium, the meiosis of microspore mother cells were continuous type and tetrads were tetrahedral.

小孢子母细胞减数分裂为连续型，形成的四分体为四面体型排列；

3. 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皮1室，边缘胎座，弯生胚珠，胚珠具双珠被、厚珠心。