Cattleya Lindl.
Cattleya Otranto
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Cattleya Ottawa
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Cattleya Ouallou
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Cattleya Oumel Baneen
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Cattleya Our Joy
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Cattleya Our Prince
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Cattleya Ouro Fraco
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Cattleya Out of Fire
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Cattleya Outburst
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Cattleya Outer Space
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Cattleya Outstanding Trio
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Cattleya Outward Bound
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Cattleya Ovation
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Cattleya Over Flow
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Cattleya Over the Reef
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Cattleya Overhills
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Cattleya Overtone
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Cattleya Overture
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Cattleya Ovidia Clotilde Alvarenga Ribeiro
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Cattleya Oviedo
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Cattleya Ovingdean
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Cattleya Owen Mygatt
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Cattleya Oweniae
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Cattleya Oweniana (=labiata)