SECTION Concoloria
- Oncidium brachyandrum Lindl. 1838
- Oncidium calimaniorum [V.P.Castro & G.F.Carr] in ed. Brazil
- !Oncidium concolor Hook. 1841 TYPE
- Oncidium dasytyle Rchb. f. 1873
- Oncidium deuteroregentii [J.M.H.Shaw] in ed. Brazil
- Oncidium disciferum Lindl. 1855
- Oncidium endocharis Rchb. f. 1884
- Oncidium gracile Lindley 1837
- Oncidium graminifolium (Lindl.) Lindl. 1841
- Oncidium hookeri Rolfe 1887 Brazil
- Oncidium loefgrenii Cogn. 1905 Brazil
- Oncidium ottonis Schltr. 1914
- Oncidium ouricanense V.P.Castro & Campacci 1992
- Oncidium paranaense Kraenzl. 1911
- Oncidium raniferum Lindl. 1837 Brazil
- Oncidium regentii V.P.Castro & G.F.Carr 2005 Brazil
- Oncidium salesopolitana [V.P.Castro & Chiron] in ed. Brazil