208 
PHARMA COG NOS V. 
Constituents. — Several alkaloids amounting to from 
0’5 to 1 per cent., of which the most important is pilo- 
carpine; volatile oil about 05 per cent., and calcium 
oxalate. 
UVA URSI (Red Bearberry). 
The leaves of Arctostaphylos Uva-ursi (Fam. Erica- 
ceae), a procumbent shrub indigenous to Europe, Asia 
and the Northern United States and Canada. 
Description. — Obovate, spatulate, 18 to 30 mm. 
long, 6 to 10 mm. broad ; apex obtuse ; base acute, 
tapering; margin entire, slightly revolute; upper sur- 
face dark green, glabrous, finely reticulate; under sur- 
face yellowish green ; petiole about 3 mm. long, slightly 
pubescent; texture coriaceous, brittle; odor slight; 
taste slightly bitter, astringent. 
Constituents. — Two glucosides — arbutin and erico- 
lin, the former being apparently the more important 
medicinally, and yielding upon hydrolysis hydroqui- 
none; a crystalline, resinous principle urson; tannin 
about 5 per cent.; gallic acid ; ellagic acid ; a yellow 
crystalline coloring principle; calcium oxalate; ash 
about 3 per cent. 
EUCALYPTUS. 
The leaves of Eucalyptus Globulus (Fam. Myrtaceae), 
a tree indigenous to Eastern Australia and Tasmania, 
and cultivated in Southern Europe, California and the 
Southern United States. The leaves are collected 
from older parts of the tree and dried, the principal 
part of the commercial supply coming from the South 
of France. 
Description. — Dorsiventral, lanceolate, scythe- 
shaped, 15 to 30 cm. long, 2'5 to 5 cm. broad ; apex 
acuminate; base somewhat unequal, acute; margin 
