apetala

Updated: May 12, 2025

Sagina apetala and patula, Spergula media and salina and many other pairs of allied species have differentiating characters of the same value as those of the elementary species of Draba verna. Filago, Plantago, Carex, Ficaria and a long series of other genera afford proofs of the same close relation between smaller and larger groups of species.

Hugo de Vries - Species and Varieties, Their Origin by Mutation