Chenopodium. - Synonym. - American Wormseed. The fruit of Chenopodium ambrosioides Linne, and variety anthelminticum Gray (nat. ord. Chenopodiaceae).


West India and Central America; naturalized in the United States.


Nearly 2 mm. in diameter, depressed-globular, glandular, dull greenish or brownish, the integuments friable, and containing a lenticular, obtusely-edged, glossy, black seed. It has a peculiar,' somewhat terebinthinate odor, and a bitterish, pungent taste.


It is composed chiefly of a volatile oil, consisting of (1) a hydrocarbon, C10Hi6, and (2) a liquid, oxygenated oil C10H16O.

Dose, 15 to 30 gr.; I, to 2. gm.

Oleum Chenopodii. Oil Of Chenopodium. Oil Of American Wormseed

Synonym. - Oil of American Wormseed. A volatile oil distilled from Chenopodium.


A thin, colorless or yellowish liquid, having a peculiar, penetrating, somewhat camphoraceous odor, and a pungent and bitter taste. Sp. gr., about 0.970.

Dose, 2 to 10 m.; .12 to .60 c.c.

Action And Uses Of Chenopodium

Wormseed is one of the most efficient anthelmintics, particularly against Ascarides, but it should be followed by a cathartic