Didymocarpus koerperi B. L. Burtt is described from near Pajakumbuh, central Sumatra. It belongs to a group of species that is chiefly distinguished by having a single nectarial gland lying below the ovary, instead of the usual cupular disc.
Gesneriaceae of the Old World II. A new Didymocarpus from Sumatra
Publication: Edinburgh Journal of Botany