ricinus

Updated: June 18, 2025

But Veronica scutellata is smooth and has a pubescent variety, and Cytisus prostratus and C. spinescens are each recorded to have a ciliate form. Comparable with the occurrence and the lack of hairs, is the existence or deficiency of the glaucous effect in leaves, as is well known in the common Ricinus.

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

I tried the following experiment: Finding a colony of these insects busily distilling on a branch of the 'Ricinus communis', or castor-oil plant, I denuded about 20 inches of the bark on the tree side of the insects, and scraped away the inner bark, so as to destroy all the ascending vessels.

David Livingstone - Missionary Travels and Researches in South Africa