作 者 ：Wang Fu-Hsiung, Chen Zu-Keng
期 刊 ：植物分类学报 1986年 6期
Keywords:Cathaya, male gametophyte,
Abstract:
There are two prothallial cells in Cathaya, but their formation is different from
that of the other genera of Pinaceae. A primary prothallial cell is cut off first and the division
of this cell gives rise to 2 prothallial cells which remain intact in mature pollen grains. 3-celled
pollen grains are formed. The interval between polination and fertilization is about 13 mon-
ths. The two sperms are different in size.