Erect, to 6 dm. high, branching with elongate internodes, glabrous. Leaves oblique, cordate at base, narrowly ovate, acuminate, penninerved, 6-10 cm. long, 2-3.5 cm. wide, remotely denticulate, petioles 10-34 mm. long, stipules deciduous, lance-ovate, subulate, 5 mm. long. Peduncles axillary, 15-28 mm. long. Cymes few-flowered, exceeded by the leaves. Bracts deciduous. Pedicels 8-10 mm. long. Staminate tepals 4, entire, obtuse, the outer ovate or elliptic, 7 mm. long, setose toward base, the inner slightly shorter. Stamens many on a short column, anthers obovate, nearly equaling the filaments. Pistillate bracteoles elliptic, entire, about equaling the ovary. Pistillate tepals 3, elliptic or obovate, entire, setose toward base. Ovary 3-celled, placentae simple, styles deciduous, connate at base, bifid. Capsule rhomboidal, attenuate at base, bearing three equal slender acuminate horns 9-11 mm. long.
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