Fig. 278. Powdered Undulated Ipecacuanha.
(X 210.) a, Starch grains. cr, Acicular crystals. fl, Pitted wood fibers. l, Bast. pc, Cortical parenchyma. ph, Phelloderm. s, s', Cork, in surface view and section. s, pitted vessels. - (From Greenish and Collin.)
This image is from Drug Powders (also see Ipecac) in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.