EPIPHYLLUM x 'LETTY MAY' variegated
This hybrid is often infected with a mosaic virus
which gives the flower splendid variegated petals.
The health of the plant is not compromised.
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Here is an example from a tulip.
The tulip variety Semper Augustus, which was the most expensive
during the tulipomania episode in the United Provinces in the 17th century,
was in fact affected by a potyvirus,
as were most of the precious varieties of that time.
(source: Wikipedia)
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However, the virus can also fail to express itself,
resulting in flowers of a completely different colour.
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