POWDERED DRUGS AND FOODS. 759 



121. JUNIPERUS. — Calcium oxalate in monoclinic prisms 

 about 30 ij. in diameter, occurring in stone cells, which are about 

 60 /;«, in diameter and with walls that are about 15 /* in thickness; 

 a small number of nearly spherical starch grains from 5 to 7 f.. in 

 diameter; fragments with oil glands and brown pigment cells. 



y Crystal Fibers Present 



I. Sclerenchymatous Fibers Strongly Lignified. 



* Colored Reddish With Alkalies. 



122. FRANGULA.— (See No. 52.) 



123. RHAMNUS PURSHIANA.— Light brown (Figs. 229, 

 A; 304) ; bast fibers long, much thickened, lignified; stone cells 

 very thick-walled, about 50 fj. in diameter; crystal fibers contain- 

 ing monoclinic crystals of calcium oxalate ; calcium oxalate also 

 in rosette aggregates or monoclinic prisms 5 to 20 /* in diameter ; 

 starch grains spherical, about 4 /* in diameter; parenchymatous 

 cells with yellowish contents colored red with alkalies. 



** Not Colored Reddish With Alkalies. 



124. QUERCUS ALBA.— (See No. 182.) 



125. PRUNUS VIRGINIANA.— Light brown; bast fibers 

 and stone cells with much thickened and strongly lignified walls ; 

 crystal fibers containing monoclinic prisms and rosette aggregates 

 of calcium oxalate 20 to 30 ;u in diameter; starch grains nearly 

 spherical, 3 to 4 /u in diameter. 



126. MYRICA CERIFERA.— Greenish-brown (p. 250) ; 

 crystals in rosette aggregates about 45 ft, in diameter, or in mono- 

 clinic prisms from 15 to 20 ^a in diameter; crystal fibers, accom- 

 panying long bast fibers, the latter being 100 fx, in diameter and 

 with walls about 25 11 in thickness; starch grains about 7 /u. in 

 diameter, also occurring in 2- to 4-compound grains. 



127. PULVIS GLYCYRRHIZ^ COMPOSITUS.— Tissues 

 of glycyrrhiza (Figs. 104; 204; 282, B) and senna (Figs. 263; 

 284, D) ; granules of sulphur (see No. 94) ; crystals of sugar, 

 and masses of manna. 



