Abstract
In this paper, chromosomes of two populations of so-called B. falcatum in Northeast China were investigated. Two cytotypes were found as follows: 2n=20 in plants from Pingdingshan, 2n=26 in plants from Wulimu. The chromosome complement of each cytotype was composed of large chromosomes and small chromosomes, showing bimodal variation in chromosome size. The number of the large chromosomes was constant to be four in them, while the number of the small chromosomes was sixteen in plants with 2n=20, twenty-two in plants with 2n=26.
