In article , Iris Cohen
writes
OK, you guys, wake up. I have a question. Any orchid grower will tell you that
hybrids between Sophronitis & other members of the cattleya alliance almost
always have a quarter to half twist in the leaves. My experience in sewing
leads me to speculate that they didn't fit the front of the leaf to the back
properly. Does anybody have a botanically more correct explanation?

Not that I think I can answer, but do you mean apical vs basal, or
dorsal vs ventral?
--
Stewart Robert Hinsley