- Cross-section of root. (19 diam.). A, Cork. B, Phloem. C, Xylem. D, Medullary ray. (Photomicrograph).
This image is from Gelsemium in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
- Cross-section of root. (19 diam.). A, Cork. B, Phloem. C, Xylem. D, Medullary ray. (Photomicrograph).
This image is from Gelsemium in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
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