John S. Heywood, Donald A. Levin, Allozyme Variation in Gaillardia pulchella and G. amblyodon (Compositae): Relation to Morphological and Chromosomal Variation and to Geographical Isolation, Systematic Botany, Vol. 9, No. 4 (Oct. - Dec., 1984), pp. 448-457
No takes yet. Share an insight, caveat, or question.
Heywood et al. (1984) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: