Rivea
(dedicated by Choisy to Auguste de la Rive, a physiologist of Geneva). ORD. Convolvulaceae. A genus comprising only a couple of species of stove climbers or twiners, natives of the East Indies. Flowers large, on axillary, one to three-flowered peduncles; sepals ovate or oblong, obtuse; corolla salver-shaped, with a long, cylindrical tube, and an angulately sub-lobed limb; stamens included; filaments short; bracts narrow. Leaves broad beneath, and, as well as the inflorescence, often woolly or silky. The species described below require culture similar to Ipomoea (which see). R. hypocrateriformis (salver-shaped). Midnapore Creeper. fl. pure white, large, expanding at sunset, and perfuming the air for a considerable distance with a fragrance resembling that of the finest cloves; corolla very wide; peduncles shorter than the petioles. July. l. cordate-roundish or altogether roundish, sometimes villous beneath. Western India, &c, 1799. Don says this species is the prince of convolvulaceous plants.
R. ornata (adorned). fl., corolla white, silky without; peduncles mostly three-flowered. June. l. orbicularly cordate or reniform, large, clothed with cinereous tomentum beneath. Stem white; branches silky. 1824.