Chromosome numbers in the tribes Anthemideae and Inuleae (Asteraceae)

Abstract

Twenty-two chromosome counts of 19 taxa (21 populations) in the tribe Anthemideae and one member (one population) of the tribe Inuleae of the family Asteraceae are reported. The Anthemideae studied belong to the subtribes Artemisiinae (14 Artemisia taxa, and one species each of the genera Dendranthema , Filifolium and Neopallasia ) and Tanacetinae (one species each of the genera Lepidolopha and Tanacetopsis ). From the Inuleae, we studied one Inula species. Five counts are new reports (including two at generic level), six are not consistent with previous counts and the remainder are confirmations of very limited (one to four records) previous data. Most of populations of Anthemideae studied have the basic chromosome number x = 9, with ploidy levels ranging from 2 x to 10 x . Dysploidy is also present, with two x = 8 diploid taxa. The species of Inuleae studied is a diploid with x = 10, also indicating dysploidy, other members of the same genus Inula having basic numbers of x = 9 or 8.