This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(Greek, krupto, conceal, and stego, cover; referring to the 5-scaled crown in the corolla-tube, which is not exposed to view). Asclepiadaceae. Tropical climbers.
Leaves opposite: flowers large and showy in a terminal trichotomous cyme; corolla funnel-shaped, the tube short. - Only 2 species, 1 from tropical Africa, and 1 from Madagascar. The juice of C. grandiflora, when exposed to the sunshine, produces caoutchouc. See Diet. Economic Products India 2:625. The plant is cult, in India for this purpose. It is rarely cult, in Old World greenhouses for ornament. It is said to be of easy cult, in a warmhouse and prop, by cuttings.
R. Br. (Nerium grandiflorum, Roxbg.). stem erect, woody: branches twining: leaves opposite, short-stalked, oblong, entire, 3 in. long, 1 1/2 in. wide: flowers in a short spreading cyme, reddish purple, becoming lilac or pale pink, about 2 in. across, twisted in the bud: fruit a follicle. Old World, probably Indian origin, but established in the African Isls. of the Indian Ocean, especially Reunion. Hooker, however, thinks that it was originally a tropical African plant. B.R. 435. - Once cult, at Oneco, Fla., by Reasoner, and not uncommon in botanic gardens under glass. Called pulay or palay in India where it is widely cult, as an ornamental. Not important as a rubber plant.
Hemsl. A climbing glabrous shrub: leaves short-petioled, leathery, variable in outline, 2-4 in. long: flowers 2 1/2-3 in. across, pink or whitish, not lilac as in many specimens of C. grandiflora; corolla-lobes longer than the tube. Madagascar. - A very showy greenhouse climber with cymose infloresence