A. involucratum n=10 ref Robinson et al. 1989; n=5 Turner and Irwin 1960 (reported as A. brasilianum, but doubts have been expressed by later authors about the accuracy of this count, and Robinson et al. 1989 reidentified the voucher)

A. platyphyllum n=10 ref King et al. 1978

References

Coleman, J. R. 1968. Chromosome numbers in some Brazilian Compositae. Rhodora 70: 228-240.

King, R. M., D. W. Kyhos, A. M. Powell, P. H. Raven, and H. Robinson. 1976. Chromosome numbers in Compositae. XIII. Eupatorieae. Annals of the Missouri Botanical Garden 63: 862-888.

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. and H. S. Irwin. 1960. Chromosome numbers in the Compositae II. Meiotic counts for fourteen species of Brazilian Compositae. Rhodora 62: 122-126.