(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.