Fig. 251. Lappa.
—Cross-section of root. (10 diam.) A, Cork. B, Resin cell. C, Xylem. D, Cambium. (Photomicrograph.)
This image is from Lappa in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
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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.