wintercress

Updated: April 30, 2025

They are evidently dependent on external circumstances, and by adequate nutrition the leaves may even become absolutely white or yellowish, with only scarcely perceptible traces of green along the veins. Some are very old cultivated varieties, as the wintercress, or Barbarea vulgaris. They continuously sport into green, or return from this normal color, both by seeds and by buds.

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