a. Bark. b. Wood-wedge. c. Pith. (12 diam.)
This image is from Geranium in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.

a. Bark. b. Wood-wedge. c. Pith. (12 diam.)
This image is from Geranium in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.