pulverulentum

Updated: May 16, 2025

They have to be gathered from their various native localities and cultivated side by side in the garden to bring out their differences. Among the species of France, according to Jordan, Helianthemum polifolium, H. apenninum, H. pilosum and H. pulverulentum are of this character.

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