Two developments in Zinnia Subgenera Diplothrix (Compositae: Heliantheae) from central Mexico

Zinnia acerosa (DC.) A. Gray var. guanajuatensis, from the state of Guanajuato, and Z. zamudiana, from the state of Querétaro, are described as new. The first differs from the typical variety in the prostrate habit, in the wider heads which contain a larger number of flowers, and in the almost compl...

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