Fig. 201. Gelsemium
- Cross-section of root. (19 diam.). A, Cork. B, Phloem. C, Xylem. D, Medullary ray. (Photomicrograph).
This image is from Gelsemium 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.