FLOWERS. 
185 
corolla bright yellow, 15 to 25 mm. long, one to three- 
toothed, four or five-veined, margin nearly entire, 
tube sometimes inclosing the remains of a filiform 
style and bifid stigma, pubescent on the outer surface ; 
ovary oblong, about 05 mm. long, pubescent; odor 
distinct; taste faintly saline, slightly bitter. 
Allied Plants. — The florets of various other Com- 
positse are sometimes admixed with or substituted for 
Calendula, of which the following may be mentioned 
together with their principal distinguishing character- 
istics: The ligulate corolla of Taraxacum officinale is five- 
toothed; the ligulate corolla of Arnica montana is seven 
to twelve-veined ; the ligulate corolla of Tussilago Far- 
fara is linear, about 13 mm. long and about 0'3 mm. 
broad, apex acute, entire; and the ray florets of Tagetes 
patula are somewhat spatulate, about 20 mm. long and 
10 mm. wide, sometimes marked with darker stripes 
and have undulate margins. 
Constituents. — Volatile oil; an amorphous bitter 
principle; a gummy substance calendulin, and resin. 
CUSSO (Kousso, Brayera). 
The pistillate flowers of Hagenia Abyssinica (Fam. 
Rosacese), a tree indigenous to Northeastern Africa, 
and cultivated in Abyssinia. The entire panicles are 
collected after fertilization and dried in the sun ; the 
flowers are sometimes stripped from the panicles, or 
the panicles are made into rolls. 
Description. — In more or less cylindrical rolls 
about 30 cm. long and about 5 cm. in diameter; 
branches cylindrical, flattened, about 3 mm. in diame- 
ter, longitudinally furrowed or wrinkled, internodes 
about 15 mm. long, externally light brown, tomentosej 
glandular, internally, cork yellowish brown, fibro- 
vascular bundles in distinct wedges, bast and wood 
