Abstract:Chromosome numbers and karyotypes in some oil plants are reported as follows:Carthamus tinctorins, 2n=24=20m (2SAT)+4 sm (2 SAT):Helianthus annuus, 2n=34=l6m+8sm (4SAT)+10st(2SAT); Ricinus communis, 2n=20=20m (2SAT); Xanthoceras sorbifolia, 2n=30=18m (2SA
