The new species, Heterostemma carnosum is described, illustrated and compared with the similar species Heterostemma dalzellii. The two species differ in peduncle, pedicel and corolla size as well as in leaf shape.
Agnihotri, P., D. Husain, P. Katiyar, D. Sahoo, M. Rodda. and T. Husain. 2019. Heterostemma barikiana (Apocyanceae, Asclepiadoideae), a new species from India, Myanmar and Thailand. Phytotaxa 419(2): 232–238.
Forster, P.I. 1992. A taxonomic revision of Heterostemma Wight & Arn. (Asclepiadaceae: Stapelieae) in Australia and the western Pacific. Aust. Syst. Bot. 5(1): 71‒80.
Kidyoo, A. 2019. Heterostemma ficoides (Apocynaceae: Asclepiadoideae), a new species with fig-like flowers from Northern Thailand. Kew Bull. 74(2): 26.
Meve, U., G. Gâteblé and S. Liede-Schumann. 2018. Two new species from the Ile des Pins (New Caledonia), and a not so new species from Grande Terre (New Caledonia). Phytotaxa: 349(3): 201–213.