Oncidium Sw.
Oncidium Wilville
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Oncidium Wimborne Gold
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Oncidium Wimmera
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Oncidium Windsor
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Oncidium Wine Butterfly
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Oncidium Wine Festival
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Oncidium Winfrith
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Oncidium Winifred
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Oncidium Winifred McLaughlin
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Oncidium Winner Again
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Oncidium Winnie
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Oncidium Winsome
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Oncidium Winsome (1932)
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Oncidium Winter Song
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Oncidium Winter Star
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Oncidium Wisley Sunrise
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Oncidium Witan
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Oncidium Witch’s Fire
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Oncidium Witch’s Jewels
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Oncidium With Bells On
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Oncidium Witleyensis
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Oncidium WOC Golden March
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Oncidium Wodonga
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Oncidium Wolterianum