Oncidium Sw.
Oncidium Cavalier
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Oncidium cavendishianum
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Oncidium cebolleta
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Oncidium Cecilia
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Oncidium Cedar
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Oncidium Celania
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Oncidium Celca
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Oncidium Celebration
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Oncidium Celeste Martini
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Oncidium Celestial
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Oncidium Celeus
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Oncidium Celle
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Oncidium Cendrillon
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Oncidium Centennial
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Oncidium Centuarie
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Oncidium Century Twenty One
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Oncidium Ceramic
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Oncidium Ceres
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Oncidium Cereus
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Oncidium Cerolia
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Oncidium Certes
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Oncidium Certhe
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Oncidium Cestuva
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Oncidium Cetargia