758 



BOTANY AND PHARMACOGNOSY. 



j8 Crystals in MonocUnic Prisms and Pyramids. 



ii8. FRANGULA. (See No. 52.) 



119. KRAMERIA. Light brown (Figs. 196; 300, C) ; scler- 

 enchymatous fibers peculiarly bent, 0.3 to 0.5 mm. long and 15 /x 

 thick; calcium oxalate in monoclinic prisms and pyramids about 

 0.1 mm. long; starch grains somewhat spherical, 20 to 30 /a in 



MRS 



Fig. 304. Rhamnus Purshiana: B, BF, bast fibers; CF, crystal fibers; Ca, Calcium 

 oxalate crystals; S, starch grains; P, parenchyma; MR, medullary rays; St, stone cells; 

 C, thick-walled parenchyma of outer cortex; K, cork. 



diameter, single or 2- to 4-compound. In Savanilla rhatany the 

 sclerenchymatous fibers are 0.5 to 0.8 mm. long and 10 to 40 /u. 

 wide. 



An alcoholic extract of Peruvian rhatany gives with alcoholic 

 lead acetate a reddish-brown precipitate and a light-brown filtrate. 

 The tincture of Savanilla rhatany gives a purplish precipitate 

 and a colorless filtrate with this reagent. 



120. RHAMNUS PURSHIANA. (See No. 123.) 



