Fig. 252. Echinacea angustifolia.
—Root. A, Cross-section of root. (Photograph.)
This image is from Echinacea in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
A herbal distance course
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.