Fig. 041-042. Crystals of Hydrastine
(enlarged and perfected by Prof. F. B. Power).
This image is from Hydrastis Canadensis in the Drugs and Medicines of North America.
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.