Fig. 090. Podophyllum. Cross-section of rootlet.
(25 diam.) A, Cortex. B. Xylem. (Photomicrograph.)
This image is from Podophyllum 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.