Reassessment of the generic status of Codonoboea (Gesneriaceae) and its species

The genus Codonoboea Ridley is reduced to sectional level within Didymocarpus. Section Codonoboea is distinguished by its epiphyllous flowers. It includes four species: Didymocarpus corneri Kiew (a new species), D. ericiflorus Ridley, D. lilacinus Ridley, and D. niveus (Kiew) Kiew. Didymocarpus caelestis (Ridley) Kiew and D. leucocodon (Ridley) Kiew, both of which Ridley placed in Codonoboea, are excluded from sect. Codonoboea.