The meiosis stages of megaspores and microspores of Eucommia ulmoides and their relations were studied. It indicates that 1) Pollen mother cell (PMC) meiosis of E. ulmoides is processing between the last ten days of March and the first ten days of April. When the anther begins outspreading, PMC comes into meiosis. The time of prophase is long, yet meiosis processes quickly since metaphase I. Pollen of E. ulmoides has two nucleoli. Pollen development goes through uninucleate stage, including prophase, metaph...