Probable Base Number for Genus x = 10
References
Robinson, H., A. M. Powell, G. D. Carr, R. M. King, and J. F. Weedin. 1989. Chromosome numbers
in Compositae, XVI: Eupatorieae II. Annals of the Missouri Botanical Garden 76: 1004-1011.
Turner, B. L., J. Bacon, L. Urbatsch and B. Simpson. 1979. Chromosome numbers in
South American Compositae. American Journal of Botany 66: 173-178.