The sex organs appear about 5 weeks after sowing.The antheridia consist of 3 cells.The archegonial neck usually consists of 4 rows and 4 columns of cells at maturity.

• 播种5周左右开始有性器官出现, 精子器由3细胞组成, 成熟颈卵器颈部由4列细胞组成, 4层细胞高。