Atotal of 2,439 plants of Scilla scilloides Complex were sampled from 174 natural populations over the Korean Peninsula and analyzed cytologically. Ten cytogenetic types were found. They are AA (2n=16), BB (18), AAB (25), ABB (26), AABB (34), ABBB (35), BBBB (36), AABBB (43), AAABBB (51) and AAAABBBB (68), where A and B are the genomes with x=8 and x=9, respectively. The AABB tetraploids are predominant (68.0%) and distributed throughout the Peninsila. The AA diploids are distributed along the west side and no population of AA was found on eastern. On the other hand, BB plants were found in the southernmost Island, Cheju-do. B genomes are more frequently observed than A genomes in southern west side of the Peninsula and thus, ABBB allotetraploids and AABBB allopentaploid which have three of B genomes were predominant in that region. The 148 populations are consisted of a single cytotype plants with respect to genome composition and others were mixed populations of two or three cytotype plants. The frequency of B-chromosomes was also investigated. The number of B-chromosome in a plant ranged from 1 to 31 and 1B plants were most predominant.