segetalis

Updated: May 8, 2025

V. segetalis is a stouter species with two dark blue spots on the tips of the upper petals. V. agrestis is a tall and branched, hairy form. V. nemausensis attains a height of only 10 cm., has rounded leaves and long flower-stalks. Even the seeds afford characters which may be made use of in isolating the various species.

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