采用石蜡切片、扫描电镜等方法对华山新麦草 (Psathyrostachys huashanica Keng.)小孢子发生和雄配子体形成过程进行了观察。结果表明 ,小孢子母细胞减数分裂为连续型 ,四分体为左右对称型 ,成熟花粉为 3 -细胞型 ,与小麦属特征一致。花粉发育后期的营养竞争可能是近二核时期花粉败育的主要原因。华山新麦草的花粉败育影响其有性生殖 ,但不能直接阻碍其有性生殖 ,因此 ,华山新麦草花粉败育可能不是致濒的主要原因。 The microsporogenesis and male gametophyte formation of Psathyrostachys huashanica Keng. Were observed by paraffin sections and scanning electron microscopy. The results showed that the meiosis of microspore mother cells was continuous, the tetrad was symmetrical, the mature pollen was 3 - cell, which was consistent with that of the genus. The nutritional competition in late pollen stage may be the main reason for pollen abortion in near two nuclear stage. The pollen abortion in P. huashanica affects its sexual reproduction, but it can not directly hinder its sexual reproduction. Therefore, the pollen abortion in P. huashanica may not be the main cause of its occurrence.