Oncidium Sw.
Oncidium Wetherby
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Oncidium Wey
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Oncidium White Caps
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Oncidium White Heron
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Oncidium White Knight
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Oncidium White Night
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Oncidium White Rock
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Oncidium White Tiger (1975)
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Oncidium White Tiger (1993)
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Oncidium Whitehead
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Oncidium Whiterock
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Oncidium Whitewood
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Oncidium Wickhamensis
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Oncidium Widecombe Fair
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Oncidium widgrenii
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Oncidium Wienhausen
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Oncidium Wiesbaden
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Oncidium Wiganianum
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Oncidium Wiganianum (Vuylsteke)
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Oncidium Wigg’s Legacy
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Oncidium Wiggs
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Oncidium Wilchello
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Oncidium Wilckeanum
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Oncidium Wild Baby