Hi Kenty, Your geneology is correct except for Miltonia-- Nelly Isler
is 1/2 Miltoniopsis and the other 3 genera in lesser amts. Grow it
"Cool" and you'll have no trouble. We grow them in Florida heavily
shaded in summer & 60% shaded in cooler months. Big difference between
Miltonia & Miltoniopsis even though the registration authority lumps
them together. It is a mule in that it won't breed further--very
pretty flower--tough plant to grow well. Good Luck, Bill