Madagascar rubbervine

Cryptostegia madagascariensis is a flowering plant species in the Apocynaceae family, native to Madagascar. It is a woody perennial vine with a distribution that extends beyond its native range to tropical and subtropical areas such as Puerto Rico and the Virgin Islands. This species is closely related to the rubber vine, and in overlapping regions, natural hybrids have been observed. These hybrids can be identified by their intermediate floral traits. A cultivated hybrid was developed in the 1930s for horticultural purposes. The species was first described in 1844 by Decne., based on work by Bojer.