Using conventional paraffin section technique,we studied anther wall formation,sporogenesis and gametogenesis in Zephyranthes candida.The main results are as follows:(1) Anthers are tetrasporangiate.Anther wall comprises epidermis,endothecium,one middle layer and tapetum and the development of anther wall is of the Monocotyledonous type.The tapetum belongs to the secretory tape.The endothecium and epidermis persist,but the cells in endothecium develop and become elongated and fibrously thickened.The cytokinesis in the microsporocyte meiosis is successive.Most of the microspore tetrads are tetrahedral and there are a few other types,such as Bisymmetric.Mature pollen grains are 2-celled.(2)The gynoecium is tricarpellary and syncarpous.The ovary is inferior with axile placentation and trilocular with two rows of anatropous ovules in each locule.The ovule is bitegmic and crassinucellate.The embryo sac development follows the Polygonum type.(3)The embryological characters of Zephyranthes are quite different from those of Amaryllidaceae.For example,the development of anther wall is of the Monocotyledonous type in Zephyranthes but of the Dicotyledonous type in Amaryllidaceae.However,these characters of Zephyranthes are similar to those of Liliaceae.