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Fig. 200. Cross-section of the stem


of Gelsemium. A, Epidermis. B, Collenchyma. C. Parenchyma of cortex. D, Bundles of sclerenchymatous cells. E, Sieve tissue. F, Cambium. G, Wood fibers. H, Tracheal tubes. I, Pith cells.
This image is from Gelsemium in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.

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