(X 183.) A, Epidermis showing crystals of carbohydrate. B, Sclerenchyma fibers. C, Trichomes. D, Sclerenchyma cell, water storage tissue near the ultimate ends of the veins. E, Aggregate crystals or calcium oxalate. F, Water tubes. G, Sclerenchyma fibers.

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