SINAPIS NIGRA—BLACK MUSTARD
Derivation.—The dried ripe seeds of Sinapis Nigra Linne.
Habitat.—Same as White Mustard.
Description.—Globular, with a circular hilum; shell blackish-brown, or grayish-brown, finely pitted, hard; embryo oily, with curved radicle and two cotyledons, one folded over the other; free from starch; inodorous when dry, but when triturated with water, of a pungent, penetrating, irritating odor; taste pungent and acrid.
Constituents.—In the presence of water the latter converts the former into the acrid, volatile, official oil of mustard.
Dose.—Same as white mustard. Commercial form of mustard is a mixture of black and white mustard, and constitutes Sinapis.