Fig. 237. Viburnum prunifolium.
- Bark of root, cross-section. A, Cork. B, Group of stone cells in cortical parenchyma.
This image is from Black Haw 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.