Synonyms: Cohniella cebolleta f. pura; Cohniella cepula (homotypic); Cohniella osteniana; Cohniella pongratiziana; Cohniella pongratziana; Cohniella wittii; Lophiaris wittii; Oncidium cebolleta f. purum; Oncidium cebolleta var. purum; Oncidium cepula (homotypic); Oncidium glaziouvii; Oncidium glaziovii; Oncidium ostenianum; Oncidium sepula; Oncidium wittii; Stilifolium ostenianum; Stilifolium pongratzianum; Stilifolium wittii; Trichocentrum cepula f. purum; Trichocentrum ostenianum; Trichocentrum pongratizianum; Trichocentrum pongratzianum; Trichocentrum wittii