采用石蜡切片法对石蒜（Lycoris radiata（L’Her．）Herb）小孢子、雄配子体和胚囊的发生发育过程进行了观察．结果表明，小孢子母细胞减数分裂过程存在滞后染色体、染色体桥、染色体片段和微核等现象；成熟花粉粒具有2核、3核和营养细胞中存在2核等异常现象；在胚囊的形成发育过程中，未见胚囊母细胞经减数分裂产生四分体的现象和7细胞8核结构的雌配子体产生，造孢细胞分裂产生2核后，细胞迅速变大并高度液泡化，其中的细胞质和细胞迅速解体消失．因此，石蒜有性生殖的败育原因，主要是由于其胚囊形成中的发育不良所致．%The Lycoris radiata that there were initiation and development process of microspore, male gametophyte and embryo sac of （L＇Her.） Herb were studied by the method of paraffin cut section. The results indicated lagged chromosomes, chromosome bridges, chromosome fragment and micronuclei during the meiosis of microsporocyte. There were double nuclei, triple nuclei in the mature pollen while double nuclei in vegetative cell, and there weren＇t tetrad phenomenon and female gametophyte with seven cell and eight nuclei during the development of embryo sac. The cell was became large rapidly and highly vacuocated, while the cell and the cytoplasm were disintegrated and disappeared after the double nuclei produced by the division of sporogenic cell. Therefore, the diapause of embryo sac was the main reason of sexual reproduction abnormality of Lycoris radiata （ L＇Her. ） Herb.
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