Technically speaking the only group of orchids that I know of that are true blue are:
1. Certain species of Disa.
2. Certain species within the genus Thelymitra or certain species within genera that are closely allied to it (i.e. Cyanicula).
All the other orchids that are commonly sold are not true blue. They are varying shades of blue violet or lavender.
As for the meaning of the word coerulea itself, it does mean blue.
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Philip
Last edited by King_of_orchid_growing:); 07-17-2012 at 06:27 PM..
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