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.
(viper-like, alluding to the serpentlike stems). Asclepiadaceae. A few species of leafless succulents of tropical Africa and Arabia, not sufficiently distinguished from Caralluma; allied to Stapelia, which see for cultivation None of the species seems to be in the trade. The stems are many-angled and tessellate, bearing small mostly fascicled flowers in the grooves: corolla rotate or approaching campanulate, 5-lobed, fleshy, yellow or purple-brown; staminal column very short and arising from the base of the corolla, and bearing the corona. The following species have recently been mentioned in garden literature: E. cereiformis, Hook. f. is 6 in. high, with elongated cylindrical serpentine or pendulous stems and bright yellow flowers in fascicles. B.M. 5930. E. Dammanniana, Spreng. not Schweinf., is similar but has dark brown-purple flowers Nile Land. E. Bentii, N. E. Br., has 7-8-ribbed stems 3/4in. or less diam. and vinous-purple flowers in pairs toward the tips of the branches. S. Arabia. B.M. 7760. E. somalensis, N. E. Br., has columnar cereus-like shrubby cylindrical 6-8-furrowed branches, and nearly sessile dark purple yellow-spotted flowers solitary or in 2's or 3's. Somaliland. B.M. 7929.