Psoralea

Psoralea, a genus of plants of the natural order Leguminosæ, sub-order Papilionaceæ. The flowers are blue, purple, or white. Some of the species are natives of India, others of other warm countries.—P. esculenta, the Bread-root of North America, and Prairie Apple of the Canadian boatmen, is a herbaceous perennial, about a foot high, with a carrot-like root, swollen above the middle, and abounding in farinaceous matter. It is used as an article of food, both boiled and raw.