POWDERED DRUGS AND FOODS. 751 



102. CAMBOGIA. — Irregular, bright yellow masses, made 

 up of small yellow particles (p. 648). 



POWDERS OF A BROWNISH COLOR. 



This group includes all those powdered drugs which have a 

 light brown (raw sienna or raw umber), dark brown (Vandyke 

 brown), blackish-brown (sepia), or grayisH-brown color. This 

 is the largest group and includes most of the powdered roots, rhi- 

 zomes and barks, together with a few flowers, fruits and seeds. 



I. FIBRpVASCULAR TISSUE PRESENT. 

 A. CONTAINING STARCH. 



a. CALCIUM OXALATE CRYSTALS PRESENT. 



a hi Rosette Aggregates. 



I. With Sclerenchymatous Fibers. 



* Containing Oil, Resin or Tannin Masses. 



103. BELLADONNA RADIX.— (See No. 117.) 



104. GOSSYPII CORTEX.— Light brown (Figs. 231 ; 231a; 

 300, H) ; bast fibers long, narrow, thick- walled, lignified; 

 starch grains somewhat spherical, 4 to 20 /a in diameter, single or 

 compound; parenchymatous cells with irregular yellowish and 

 reddish tannin masses ; calcium oxalate crystals rosette-shaped, 

 about 20 fi. in diameter. 



105. RUBUS. — Light brown ; bast fibers numerous, long, 

 thick-walled, lignified; calcium oxalate in rosette aggregates 25 

 to 30 /i in diameter; starch grains nearly spherical, 3 to 7 /* in 

 diameter, single or compound. 



106. JUGLANS. — Crystals usually in rosette aggregates 15 

 to 35 II or sometimes in monoclinic prisms 10 to 15 fjt, occurring 

 in parenchyma or occasionally in crystal fibers ; bast fibers, 30 /* 

 wide and very long; stone cells, 35 to 50 /a; oily drops and pur- 

 plish-brown tannin masses in parenchyma. J. cinerea is distin- 

 guished from /. alha and /. nigra in that both of the latter possess 

 numerous crystal fibers containing prismatic or rhombohedral 



