. . . . . "Psoralea is a genus in the legume family (Fabaceae). Although most species are poisonous, the starchy roots of P. esculenta (breadroot, tipsin, or prairie turnip) and P. hypogaea are edible. A few species form tumbleweeds.Common names include tumble-weed (P lanceolata), and white tumbleweed."@en . . . . . .