Ovule development of Cycas panzhihuaensis L. Zhou et S.Y. Yang

摘要

Cycas panzhihuaensis L. Zhou et S.Y. Yang, occuring in a natural state in China, is the material for the present study. This paper reports mainly on its development of ovule. The developmental process of the ovule has been traced in its original region and a time course is given. The development and structure of the ovule in this species is similar to those of other Cycas. A morphological change of the ovule during pollination is reported.