NEW TAXA OF THE GENUS RANUNCULUS FROM CHINA AND THEIR KARYOTYPES
中国毛茛属新分类群及其核型

Ranunculus shuichengensis L. Liao from Guizhou Province and R. silerifolius Levl var dolicanthus L. Liao from Yunnan Province are described as new and their kary-otypes are also reported in this paper. The new species showed two karyotypes, i. e. the common type 2n = 2x = 16 = 4m 2sm 10st(2SAT) and the heterozygoustype 2n = 2x = 16 = 4m 2sm 9st(lSAT) It(lSAT). The karyotype variation was the occurrence of het-eromorphous SAT-chromosomes. It is similar to R. trigonus Hand-Mazz. in mophology and karyotype, but different from the latter by petals broad-obovate, achenes suborbilcular and reduced short arm of SAT-chromosomes (See Plate 1). The karyotype of the new variety (2n = 2x=16 = 4m 2sm 10st(2SAT)) is not the same as that of var. silerifolius. According to the characteristics of the morphology and chromosomes, we consider that the two new taxa under study and R. trigonus are intermediate in the transition from x = 8 to x =7.