Fig. 299. Powdered Jalapa.

(X 183.) A, Starch grains. B, Parenchyma cells. C, Parenchyma cell filled with starch. D. Water tubes. E, Stone cells. F, Fragments of porous water tubes. G, Aggregate crystals of calcium oxalate.

This image is from Drug Powders (also see Jalap) in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.