Fig. 067. Serpentaria - Cross-section of rhizome.
(25 diam.) A, Parenchyma of cortex. B, Medullary ray. C, Xylem. D, Phloem. E, Medulla. (Photomicrograph).
This image is from Serpentaria in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
