Fig. 203. Cross-section of root.
of spigelia (X64). A, Epidermis. B, Parenchyma of primary cortex. C, Endodermis. D, Pericycle. E. Phloem. F, Xylem.
This image is from Spigelia 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.