POWDERED DRUGS. 
287 
2. STARCH GRAINS 5 TO 15 M IN DIAMETER. 
50. Mezereum. — Dark yellow ; sternutatory ; bast fibers 
numerous, long, thin-walled, non-lignified; starch grains 
somewhat spherical, 10 to 15 ft in diameter, single or 
compound. 
51. Pareira. — Dark yellow ; sclerenchymatous cells 
numerous, more or less thick- walled and slightly lig- 
nified ; sclerenchymatous fibers slightly lignified and 
with oblique, simple or bordered pores ; ducts nearly 
0'2 mm. in diameter, short, non-lignified, and with 
simple pores: starch grains nearly ellipsoidal, 7 to 15 
in diameter. 
52. Serpentaria. — Dark yellow ; ducts lignified, spiral 
or with simple pores ; sclerenchymatous fibers ligni- 
fied ; parenchyma with yellowish or dark-brown con- 
tents ; starch grains nearly spherical, 10 ^ in diameter. 
3. STARCH GRAINS LESS THAN 5 M IN DIAMETER. 
53. Hydrastis. — Bright yellow; ducts with simple 
pores; sclerenchymatous fibers short, thin-walled, with 
simple pores ; starch grains spherical, about 4 n in 
diameter. 
4. STARCH GRAINS ALTERED. 
53a. Curcuma. — (See No. 40). 
B. STARCH GRAINS FEW OR NONE. 
a. Calcium-Oxalate Crystals Present, 
a IN ROSETTE-SHAPED CRYSTALS. 
54. Anisum. — Yellowish brown; non-secretion hairs 
25 to 100 long, one-celled, straight or curved, with nu- 
merous slight centrifugal projections ; calcium oxalate 
crystals rosette shaped, 2 to 3 n in diameter, in aleurone 
grains about 6 n in diameter; fragments of vittse, and 
long, narrow, brownish epidermal cells; sclerenchy- 
matous cells of carpophore short, with simple pores and 
occasional scalariform thickenings. 
