Abstract: Spore morphology of 11 species of Cyatheaceae from China was examined by the means of scanning electron microscope (SEM). The spores are radially symmetrical and trilete. The aperture ( laesura ) arms are about 3??4 length of the radius of spores. The spores are often triangular in polar view, and hemispheric or flabellate in equatorial view. The length of polar axis is about 28-42μm. The length of equatorial axis is about 32-52μm. The ornamentations of spores are formed by perispore. They can be divided into 4 types, i. e. striate, verrucate, echinate-striate, short- echinulate. The classification of genera in Cyatheaceae was discussed in the present paper.

Key words: Cyatheaceae

摘要： 对中国桫椤科(Cyatheaceae ) 11 种植物的孢子形态进行了扫描电镜的研究。桫椤科孢子辐射对称, 三裂缝, 裂缝长度达孢子半径的3/4 左右, 极面观三角形, 赤道面观为半圆形或扇形, 孢子极轴长为27～42μm, 赤道轴长为32～52μm。孢子表面纹饰是由周壁形成的, 可分为4 种类型, 即条纹状、疣状、刺条状、短刺状。根据孢子的形态特征, 对中国桫椤科孢子类型进行了划分, 对属的划分问题进行了探讨。

关键词: 桫椤科, 孢子形态, 蕨类植物FONT