Abstract
Chromosome counts are reported of 38 populations representing 24 species of the genus Cousinia from Iran, one of the main centres of speciation of the genus. Sixteen of the counts are new to science. Our results confirm that Cousinia exhibits a complex dysploid series ranging from x = 13 to x = 9. One of the basic chromosome numbers, x = 9, is new for the genus and must be confirmed. Some considerations on the correlation between chromosome numbers and section classification are made. © 2006 The Linnean Society of London, Botanical Journal of the Linnean Society, 2006, 151, 411–419.
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