Wells contended that fire was the selective force behind the convergent evolution of the obligate seeding strategy in Arctostaphylos and Ceanothus, and was accompanied by prolific speciation, due in part to a much greater number of sexual generations for seeders than for resprouters.
View Research Brief PDF >
Wells, P. V. 1969. The relation between mode of reproduction and extent of speciation in woody genera of the California chaparral. Evolution 23: 264-267.