According to the morphology change of female cones,the pollination period might be divided into five stages.Pollen grains were captured by stigmatic hairs without pollination drop.

• 依据雌球花形态特征的变化，可将传粉期分为5个阶段，整个期间无传粉滴出现，由球被顶端大裂片的珠被毛接收花粉。