NEW OR RARE CHROMOSOME COUNTS IN TEN SPECIES OF COUSINIA FROM IRAN (I)

The meiotic chromosome counts are reported in ۱۰ species of the genus Cousinia including: C. adenostegia, C. antonowii, C. chaetocephala, C. dasylepis, C. eriobasis, C. freynii, C. prasina, C. rechingerorum, C. termei and C. trachyphyllaria from Iran. Specimens have been collected from different parts of Iran out of which, eight species are considered to be new and two provide confirmation of the previous data. The chromosome number in all studied species is n=۱۳ (except Cousinia antonowii and C. eriobasis i.e.n=۱۲).