Riocreuxia
(named after A. Riocreux, a celebrated botanical artist). ORD. Asclepiadeae. A small genus (four P species) of slender, pubescent or glabrous, greenhouse, twining sub-shrubs, confined to South Africa. Calyx of five narrow segments; corolla with an elongated tube and linear lobes; corona sub-duplex, the exterior of five to ten scales, the interior of five smaller ones; cymes loose, umbelliform or dichotomous; peduncles simple or branched; pedicels filiform. Leaves opposite, cordate, membranous. R. torulosa, the only species introduced, thrives in sandy loam. Plenty of pot room and ample drainage must be afforded. Propagation may be effected by cuttings, taken preferably in spring, and inserted in sand, under a hand glass, with slight bottom heat.
R. torulosa (somewhat twisted). fl. pale yellow, flask-shaped, greenish at their ventricose base; umbels pedunculate, lateral or terminal, loose-flowered. Summer. l. deeply cordate-ovate. Roots tuberous. 1862. (Ref. B. 157.)