Karyotypes of Taraxacum laevigatum (Asteraceae) in Japan

Abstract

We examined the chromosome number of Taraxacum laevigatum naturalized in Japan using 35 plants collected from a total of 12 localities distributed throughout Hokkaido, Akita, Tochigi, Toyama, Gifu, Aichi, Osaka, Okayama and Okinawa Prefectures in Japan. All plants had 2n=24 chromosomes (triploid), but we identified 2 strains with different karyotypes formulated as 2n=24=1M+15m+5sm+3sm_cs and 2n=24=2M+19m+2m_cs+1sm_cs.