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 for green and bell, alluding to the flowers). Asclepiaddcese. Twiners, one of which is planted far South.
Large plants with opposite cordate entire heavy leaves, notched stipules and purplish or greenish flowers in axillary panicles: calyx 5-parted; corolla deeply 5-lobed; corona of 5 lobes coming from the base of the filaments, the lobes obcordate or broader, sometimes with an erect or incurved projection or horn on the back; pollen granular. - Two species in tropical and S. Africa C. ecornutus, N. E. Br., is apparently not in cultivation
Whiteii, Hook. f. Strong woody twiner, with large opposite cordate-ovate thick leaves and axillary clusters of odd flowers 3/4-1 in. diam.; corolla rotate-bell-shaped, thick; segments ovate and acute, purple and with margins and central stripe green, and bearing long-notched lobes; corona-lobes horned; anthers connivent over the capitate stigma. Guinea to Natal. B.M. 5898. G.C. III. 18:243. - It is now cult, in S. Fla. and S. Calif. The roots are used medicinally in Natal, under the name of mundi. The plant is an interesting greenhouse climber, but not handsome. l, h. B.