Fig. 281-286.
Microscopical examination.
Plate III.
Fig. 281. Fig. 282.
Fig. 283. Fig. 284.
Fig. 285. Fig. 286.
This image is from Drug Powders (also see Starch) in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
A herbal distance course
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.