Cattleya Unique Splendor
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Cattleya United Nations
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Cattleya United States
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Cattleya Unnamed grex
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Cattleya Unnamed grex
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Cattleya Unnamed hybrid
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Domingoa Unnamed hybrid
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Lepanthes Unnamed hybrid 1
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Cattleya Upton Gem
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Cattleya Urania
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Cattleya Uranus
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Cattleya Urbania
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Cattleya Urfé
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Cattleya URG1
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Masdevallia urosalpinx
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Cattleya Ursula (1907)
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Cattleya Ursula (1936)
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Cattleya Ursula Adam
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Cattleya Ursula Hausermann
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Masdevallia Urubamba
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Masdevallia Urundil
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Cattleya Uschi
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Dracula Uschi
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Cattleya Uster