Didymoplexis africana Summerhayes 1951 publ. 1952
Didymoplexis africana was described by Summerhayes (1951 publ. in Jan. 1952) from several specimens found in North-East Tanzania, Usambara mountains, where they grew in the deep shade of the tropical evergreen rain-forest. First it was thought to be a species of Auxopus, because the fruiting pedicels elongate enormously, reaching a length of as much as 25cm, but with better material, Summerhayes (1951 publ. 1952) determined later, that it belongs to the, until then, asian genus Didymoplexis. The bilabiate perianth and various calli on the lip lead to his decision, although detailed structure of the latter was quite different from any other species. Further distinctions from other species of the genus are the more distinctly clawed lip and the transversaly undulate callus (instead of longitudinal). Today the distribution of the species has been recorded from Liberia, Ivory Coast, Ghana, Congo and Tanzania (POWO 2021).