Allamanda blanchetii
Allamanda blanchetii (purple allamanda, violet allamanda; syn. "Allamanda violacea") is a species of perennial flowering plant in the family Apocynaceae native to Brazil. Cultivated as an ornamental plant, it grows in full sun in USDA Zones 9b through 11 including central and south Florida, southernmost Texas, and coastal California. This plant's purple, bell-shaped blooms are about 3" across. It is also called red bell. Fiber is extracted from stalk with high strength and silky white after chemical treatment.