八角枫小孢子发生和雄配子体发育

八角枫药壁的发育为基本型。分泌型绒毡层。药室内壁未见纤维状加厚，药壁开裂时，与中层、绒毡层一样退化消失，仅剩宽锯齿状的表皮。小孢子母细胞以同时型的胞质分裂形成四分体。大多数四分体呈四面体型，少数也有左右对称和十字交叉型。成熟花粉粒二细胞，赤道面观为椭圆状，极面观近三裂圆形。三孔沟，外壁具密集的细网状纹饰，细胞内贮藏有丰富的淀粉植。

STUDIES ON MICROSPOROGENESIS AND DEVELOPMENT OF MALE GAMETOPHYTE OF ALANGIUM CHINENSE (LOUR. ) HARMS

The development of anther wall belongs to the basic type and the tapetum isglandular. The endothecium doesn--t develop fibrous thickenings and disappears as the middlelayers and the tapetum did, only sawtooth--shaped epidermis is kept when the antherbreaks. Simutaneous cutokinesis in the microspore mother cell follows meiosis and themicrospore tetrad is usually tetrahedral,but sometimes it may be decussate or bilateral.The mature pollen grains are 2--celled and tricolporate. They are elliptic from equatorialview and subtrilete spheroidal from polar view. There are contentrated exine sculpure ontheir surface. Pollen grains are filled with starch grains.