Abstract: Lycoris sprengeri Comes ex Baker is endemic to China. Reported in the present paper are the chromosomes number and karyotypes for two wild populations of the species from Anhui. ( 1 )Caishi population has a karyotype 2n=33=9st+21t+3T. The length of chromosomes ranges from 5.58～9.15μm. The karyotype belongs to Stebbin’s (1971) “4A”. (2)Longyashan populations have two karyotypes. The karyotype formula of the type I is 2n=22=8st+14t, with chromosomes ranging from 6.88～9.15μm. The karyotype belongs to “4A”. The karyotype formula of the type Ⅱ is 2n＝22＝1m+1sm+14st+6t, with chromosomes ranging from 7.20～15.80μm. The karyotype belongs to “3B”. The triploid type of L. sprengeri was discovered in Anhui for the first time. The karyotype 2n=22 =1m+1sm+14st+6t in diploid type of this species is here reported for the first time.The Robertsonian change plays a key role in karyotype evolution of Lycoris.

Key words: Lycoris sprengeri Comes ex Baker, Triploid, Anhui