Cribb, P., L. Gautier & L. Nusbaumer (2013). How many species are there in the holomycotrophic genus Didymoplexis Griff. (Orchidaceae) in Madagascar? Candollea 68: 41–49. In English, English and French abstract.
The holomycotrophic genus Didymoplexis Griff. (Orchidaceae) is revisited for Madagascar. Two species, Didymoplexis avaratraensis P. J. Cribb, Nusb. & L. Gaut. and Didymoplexis recurvata P. J. Cribb, Nusb. & L. Gaut. are newly described based on recently collected flowering specimens. The relationship between these two species, the recently observed Didymoplexis verrucosa J. Stewart & Hennessy and the cryptic Didymoplexis madagascariensis (H. Perrier) Summerh., only known from two fruiting specimens, is discussed. A key to species in the genus in Madagascar and Africa based on flowering material is provided.