POWDERED DRUGS. 
305 
with irregular, simple, oblique pores ; few globules of 
fixed oil. 
151. Opium.— (See No. 157). 
152. Pyrethrum. — Dark brown; parenchymatous cells 
with irregular crystalloidal masses of inulin ; periderm 
with nearly isodia metric stone cells, the contents of 
which are yellowish brown; ducts reticulate, narrow ; 
sclerenchymatous fibers few ; secretion reservoirs with 
oil and resin. 
The root of Anacydus officinarum contains tannin, 
and an aqueous extract gives a precipitate with 
ammonio-ferric-alum solution. 
153. Taraxacum.— Light brown; parenchyma con- 
taining irregular crystalloidal masses of inulin ; lati- 
ciferous vessels yellowish brown; ducts reticulate; 
intermediate fibers non-lignified, with irregular simple 
and oblique pores. 
154. Triticum. — Light brown; ducts lignified, with 
spiral or annular thickenings or simple pores ; scle- 
renchymatous fibers long, thick-walled, strongly ligni- 
fied; endodermal cells with inner walls thickened and 
slightly lignified ; parenchyma with irregular masses 
of a soluble carbohydrate. 
II. WITHOUT FIBROVASCULAR TISSUE. 
A. WITH CELLULAR TISSUES. 
155. Ustilago. — Grayish - brown, nearly spherical 
spores (7x7 y ) ; little or no foreign substances. 
Spores of Coprinus comatus, blackish and ellipsoidal 
(10 x 5 y). Spores of Agaricus campestris more brown- 
ish than those of corn smut, ovoid and about 5 x 7 y. 
156. Ergota.— Oil globules ; red or violet coloration 
in chloral and sulphuric acid ; odor peculiar. 
157. Opium. — Brownish ; in glycerin mounts con- 
sisting of grayish-brown, irregular granular masses 
