Lecananthus and Leucocodon, two genera to be added to the tribe Schradereae (Rubiaceae)

The presence of a combination of various character states (epiphytic habit, adventitious rootlets in rows along the internodes; capitate, involucrate inflorescences; certain floral features such as ‘hooded’ corolla lobe apices; heterodistyly; fruit and seed morphology and anatomy; leaf anatomy) provides evidence that the monospecific Sri Lankan endemic Leucocodon and the small Malesian genus Lecananthus are to be added to the Schradereae, a tribe hitherto thought to be monogeneric.