POWDERED DRUGS AND FOODS. 



757 



115. GERANIUM. Dark brown; starch grains somewhat 

 ellipsoidal or ovoid, 10 to 15 /x in diameter; rosette aggregates of 

 calcium oxalate, 45 to 70 fi in diameter ; tracheae annular or scalari- 

 form ; parenchyma with irregular tannin masses. 



116. RHEUM. (See No. 49.) 



S&^e? 



Fio. 303. Belladonna root: S, parenchyma cells containing starch; CA, cells con- 

 taining cryptocrystalline crystals of calcium oxalate; K, cork; T, fragments of tracheae 

 with annular markings or simple pores; P, parenchyma; F, wood fibers with narrow 

 oblique pores. 



** Without Tannin. 



117. BELLADONN.^ RADIX. Light brown (Figs. 191, 

 199, 303) ; calcium oxalate in sphenoidal micro-crystals; tracheae 

 few, scalariform or with bordered pores ; sclerenchymatous fibers 

 relatively few; starch grains numerous, spherical, 5 to 15 /x in 

 diameter (Fig. 200). 



