in Botany, a genus of the filiqua order, belonging to the tetradyamia class of plants; and in the natural method ranking under the 39th order Silicaceae. The filique parts adnate with a spring, and the valves roll spirally backward; the stigma is entire, and the calyx a little gaping. Of this there are 15 species; but the most remarkable is the pratensis, with a large purplish flower. This grows naturally in many parts of Britain, and is also called cuckowflower. There are four varieties, viz. the single, with purple and white flowers, which are frequently intermixed in the meadows; and the double, of both colours. The single sorts are not admitted into gardens; but the double deserve a place, as making a pretty appearance during the time they are in flower. They will thrive in a moist shady border; and are propagated by parting their roots, which is best performed in autumn. They delight in a soft loamy soil, not too stiff. By some the plant is reckoned antifebrifuge.