Fig. 155. Quassia - Cross-section of wood.

Fig. 155. Quassia - Cross-section of wood.

(65 diam.) A, Water tube. B, Medullary ray. C. Wood fibers. (Photomicrograph.)

This image is from Quassia in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.