Senecio L. (Asteraceae) in Australia: Chromosome Numbers and the Occurrence of Polyploidy

Abstract

Chromosome numbers of 106 populations representing 43 taxa of Senecio native to Australia and four African species are reported. Chromosome numbers of 2n = 38, 40, 60, 70, 80, 98, 100, and 120 occur amongst the native taxa. The distribution of ploidy levels within three morphological groups and the abundance of taxa with n = 30 are discussed.