Abstract: The formation of micropores, development of male gametes and germination rate of pollen grains in Manglietia insignis (Wall.) Bl. were investigated in this paper. Its anther is 4-sporangiate. The anther wall is composed of 5-6 layers, epidermis, fibrous endothelium, middle layer (1-2 layers) and glandular tapetum (2-3 layers). Cytokinesis at meiosis of microspore mother cells is modified simultaneous, and tetrads are decussate or isobilateral, occasionally linear. Mature pollen grains are 2-celled. In addition, special characteristics in microsporogenesis were discussed. The results of artificial germination of pollen grains showed that the germination rate was 14.7%～25.3%. The process of male gamete formation was not considered as an important factor responsible for the low seeding rate.

Key words: Manglietia insignis

摘要： 首次报道了木莲属胚胎学特性，研究了红花木莲Manglietia insignis (Wall.)Bl.的小孢子发生、雄配子体的发育以及花粉萌发情况。红花木莲花药具有4个小孢子囊，花药壁5～6层。腺质绒毡层具2～3层细胞；小孢子减数分裂后胞质分裂为修饰性同时型；四分体排列方式为交叉型或左右对称型,偶为直线型；成熟花粉粒为二细胞型花粉粒。同时报道了红花木莲在小孢子发生过程中的特有现象。花粉萌发率为14.7%～25.3%。联系红花木莲花粉粒数目和胚珠数目进行探讨，认为雄配子体发育不是影响红花木莲结籽率低的主要因素。

关键词: 红花木莲, 小孢子发生, 雄配子体发育, 濒危植物