Abstract: The karyotypes of Allium macranthum Baker, Allium wallichi Kunth and its variety Allium wallichi Kunth var. platyphyllum J. M. Xu were investigated. They had the same basic chromosome numbers of x= 7. There were diploid and tetraploid observed in the species Allium macranthum. Their karyotypes could be formulated as 2n=2x= 14= 10m+4st and 2n = 4x = 28 = 20m+8st respectively, belonging to Stebbins/ 2B type. The ratios between longest to shortest chromosome were 3.03 and 3.00 respectively. The centromeric terminalization values were 60.67 and 59.70 respectively. There were also diploid and tetraploid observed in the species Allium wallichii. Their karyotypes could be formulated as 2n= 2x= 14=4m(2SAT)+10sm and 2n=4x=28= 12m(2SAT)-H6sm respectively, belonging to Stebbins/ 2A type.

Key words: Allium macranthum