yes, some florists dye their orchids, for reasons that utterly escape me... anyhoo, the only true blue orchids i've seen are certain vandas:
and of course now i can't find any pictures. but i've seen some of them in real life--they're actually blue, not purple, as are the "blue" ones in this link:
http://www.rforchids.com/cgi-local/s...s%20mericlones
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http://www.oneplusyou.com/q/v/caffeine
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"Apart from the utility of binomials for standardizing reference for effective communication,
Laelia Speciosa is a tad easier to pronounce and spell than its Atzec name
chichiltictepetzacuxochitl."
--Alec Pridgeon