294 
PH A RMA COGNOSY. 
about 10 /i in diameter ; starch grains somewhat 
spherical, about 10 n in diameter, single or compound ; 
stone cells nearly isodiametric, thin-walled, and with 
numerous simple pores and branched canals, contents 
colorless or reddish-brown; oil -secretion reservoirs 
with wine-colored contents ; oil globules numerous ; 
parenchymatous cells occasionally lignified, and with 
irregular reddish - brown tannin masses, which are 
colored greenish with ammonio-ferric sulphate solution. 
ft Oil-Secretion Reservoirs Wanting. 
89. Galla (Aleppo). — Dark yellow ; crystals 10 // in 
diameter; starch grains about 10 in diameter, single 
or sometimes in groups; stone cells; tannin; crystals of 
gallic acid. 
90. Geranium, — Dark brown; starch grains somewhat 
ellipsoidal or ovoid, 10 to 15 /a in diameter; calcium- 
oxalate crystals rosette-shaped, 45 to 70 in diameter ; 
ducts annular or scalariform ; parenchyma with 
irregular tannin masses. 
90a. Rheum. — (See No. 38). 
** WITHOUT TANNIN. 
91. Belladonnae Radix. — Dark brown ; ducts few, scalari- 
form or with simple pores ; sclerenchymatous fibers 
relatively few ; starch grains numerous, somewhat 
spherical, 5 to 15 n in diameter, single and two to 
three-compound. 
/3 CRYSTALS IN MONOCLINIC PRISMS AND PYRAMIDS. 
92. Frangula. — (See No. 41). 
93. Krameria. — Light brown; sclerenchymatous fibers 
peculiarly bent, 0'3 to 0'5 mm. long and 15 ^ thick; 
calcium oxalate in monoclinic prisms and pyra- 
mids about 01 mm. long ; starch grains somewhat 
spherical, 20 to 30 in diameter, single or two to four- 
