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SCIENTIFIC AND APPLIED PHARMACOGNOSY 



FIG. 38. Aletris. A, transverse section of rhizome showing epidermis (E); cor- 

 tical parenchyma containing either starch grains (S) from 0.002 to 0.010 

 mm. in diameter or raphides of calcium oxalate (Co) from 0.015 to 0.035 mm. 

 in length; endodermis (En) more or less distinct in the living plant but usually 

 not well-marked in the drug; fibro vascular bundles composed of tracheae (T) 

 and sieve (L); sclerenchymatous fibers (Sc). B, transverse action of root 

 showing epidermis (E); cortical parenchyma containing starch (S); endo- 

 dermis (En) consisting of thick-walled reddish fibers; tracheae (T); scler- 

 enchymatous fibers (Sc); sieve (L). C, isolated short, porous sclerenchy- 

 matous fibers from the rhizome. Drawn by Haase. 



