KARYOTYPE ANALYSIS IN SOME GENERA OF COMPOSITAE. VIII. FURTHER STUDIES ON THE CHROMOSOMES OF ASTER

Abstract

H uziwara , Y. (Kobe U., Mikage, Kobe, Japan.) Karyotype analysis in some genera of Compositae. VIII. Further studies on the chromosomes of Aster. Amer. Jour. Bot. 49 (2) : 116–119. Illus. 1962.—The karyotypes of 3 Asiatic and 3 American taxa of Aster are reported here for the first time. These are: A. ageratoides subsp. sugimotoi (Kitamura) Kitamura 2 n = 36, A. ageratoides subsp. (Taxon AIII) 2 n = 72, A. himalaicus C. B. Clarke 2 n = 18, A. ericoides L. 2 n = 32, A. meritus A. Nels. 2 n = 27, A. umbellatus Mill. 2 n = 18. Two American taxa, namely, A. meritus and A. umbellatus , are considered to be ancestral taxa which have retained primitive karyotypes similar to those of Asiatic species of Aster .