Karyotype analysis of Lycium ruthenicum Murr. was carried out in this study. The results showed that the chromosome number was 2n=2x=24; the arm index was 48; the ratio of the longest chromosome to the shortest one was 1.31; the proportions of chromosomes with arm ratio higher than 2 was 0.08; the asymmetry index was 57.02; the karyotype type was 2A; and the karyotype formula was 2n=-24=20m＋4sm.
