Fig. 143. Xanthoxylum - Cross-section of bark.
(15 diam.) A, Cork. B, Resin cells. C, Medullary ray. (Photomicrograph.)
This image is from Prickly ash in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
Practical Herb Cards 2
Distance course
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