It is a Cattley alliance for sure. When I find a plant like this, I usually go to Google and start looking for Cattleya plants for sale - then start comparing pictures. This is a hybrid, not a species. It might take some searching or you might get lucky and find someone on here that is also growing a similar plant. Personally, I would almost bet it had C. intermedia aquinii in it. When you search, add 'splash petal' or 'flare petal' to your search words - so look for something like 'Cattleya splasy petal'. GOOD LUCK !