Karyomorphological study on some species of Launaea in Egypt

Abstract

Chromsome numbers and karyotypes of four taxa of Launaea (Asteraceae) were studied. They showed various chromosome numbers and karyotypes. Launaea nudicaulis (2n=18) had 18 median chromosomes, L. capitata (2n=18) had 18 median chromosomes, L. fragilis subspecies fragilis (2n=16) had nine median and seven submedian chromosomes and L. fragilis subsp. teniuloba (2n=32) had 31 median and one submedian chromosomes.