Abstract: During May and November of 2017, 13 different clones of Illicium verum were selected for observation on flower at Nanning Anise Genetic Resources Center, Guangxi. The results showed that flowering phase was from June to October, with a large number of flower buds from June, in full bloom from July to September. It had the most flower buds in June and July, less in August, and a few in September and October. It had obvious difference (P<0.05) of amount of flowers among different aged branches, with the most on current year branches, followed by 1-year ones and older ones. It had evident difference (P<0.05) of growth period of flower among clones, with mean of 31.20 days, among them, 27.69 days for bud, 3.51 days for blooming without significant difference among clones. Calyx 2-4, mostly 3, tepals 6-16, mostly, androecium 10-26, mostly 10-18. Gynobase had 5-13 carpels, commonly 8 ones.