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以牛心李（ＰｒｕｎｕｓａｍｅｒｉｃａｎａＭａｒｓｈ）为材料，系统地观察了李的大小孢子与雌雄配子体发育，结果表明：①３月末～４月末为小孢子及雄配子体发育时期。小孢子母细胞减数分裂中，胞质分裂为同时型，呈四面体型排列，成熟花粉为２—细胞型，②４月中旬～５月初，为大孢子和雌配子体发育时期。双珠被、厚珠心，胚囊发育属单孢子蓼型。并对其发育的时序性、地域性等问题进行了讨论。
The microspore and male and female gametophyte development of Li were systematically observed using Prunus mericana Marsh. The results showed that: ①The microspore and male gametophyte development period from the end of March to the end of April. During meiosis of microspore mother cells, the cytokinesis was divided into syncytial type and arranged in tetrahedron pattern. The mature pollen was of 2-cell type. ②Middle spore and female gametophyte developmental period from mid April to early May. Double beads, thick beads, embryo sac development is a single spore Polygonum type. And discussed the development of the timing, regional and other issues were discussed.