in botany, a genus of the decandria order, belonging to the diadelphia class of plants. The most remarkable species are, 1. The primata, or pinnated psoralea, rises with a woody soft stem, branching five or six feet high, pinnated leaves of three or four pairs of narrow lobes terminated by an odd one, and at the axillas clove-sitting blue flowers with white keels. It is a native of Ethiopia. 2. The bituminosa, or bituminous trifoliate psoralea, rises with a shrubby, tall, branching sparingly, about two or three feet high, with ternate or three-lobed leaves of a bituminous scent, and blue flowers in clove heads. Grows in Italy and in France. 3. The aculeata, or aculeated prickly psoralea, rises with a shrubby branching stem three or four feet high, with ternate leaves, having wedge-shaped lobes, terminating in a recurved sharp point, and the branches terminated by roundish heads of blue flowers. Grows in Ethiopia. These plants flower here every summer; the first fort greatest part of that season, and the others in July and August; all of which are succeeded by seeds in autumn. Keep them in pots in order for removing into the greenhouse in winter. They are propagated by seeds, sown in a hot-bed in the spring; and when the plants are two or three inches high, prick them in separate small pots, and gradually harden them to the open air, so as to bear it fully by the end of May or beginning of June. They may also be propagated by cuttings any time in summer, planted in pots and plunged in a little heat, or covered clove with hand-glasses, shaded from the sun and watered.