Heterospory evolved during the Devonian period from isospory independently in several plant groups; the clubmosses, the arborescent horsetails, and progymnosperms as part of the process of evolution of the timing of sex differentiation.
Heterospory evolved during the Devonian period from isospory independently in several plant groups; the clubmosses, the arborescent horsetails. Heterospory evolved during the Devonian period from isospory independently in several plant groups; the clubmosses, the arborescent progymnosperms as part of the process of evolution of the timing of sex differentiation.