<正>本文报道了悬铃木开花结实形态发育过程。观察发现,胚珠败育是普遍现象,胚珠败育后,果皮及果毛继续发育。文内附悬铃木开花结实形态发育时间表。

Observations were made on the flowering and the fruitfication development of Platanus acerifolia the materials were collected from 20~30 year old trees during 1981?984 in Nanjing. Most of the ovules aborted during June to November; however, the ovaries with hairy walls grow into hairy nutlets in the next year. A timetable for the development of the flowers and fruits is given.