Abstract:The paper deals with the chromosome numbers and karyotype analyses of six species of Artemisia from southwestern China.Their karyotype formulae are as follows:A.japoniaThunb.,2n=18=12m+6sm(2SAT); A. parviflora Buch.-Ham.ex Roxb.,2n=36=30m+4sm+2st(6SAT);A.dubia Wall.ex Bess.,2n=36=28m+8sm(2SAT),A.myriantha Wall.ex Bess.,2n=36=30m+ 6sm,A.lavandulaefolia DC.,2n=54=42m+12sm;A.velutina Pamp.,2n=54=36m+18sm.