Oncocalyx angularis Oncocalyx fischeri Oncocalyx glabratus Oncocalyx ugogensis Oncocalyx cordifolius Oncocalyx welwitschii Oncocalyx kelleri Oncocalyx bolusii Oncocalyx ghikae Oncocalyx sulfureus Oncocalyx quinquenervius Oncocalyx doberae
Tieghemia
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024