Ethan many of the Potinaras were renamed with all the crazy reclassification that has been going on. According to OW the old name is Potinara, and the new name is Rhynchosophrocattleya.
Doc, Ethan is right you cant' register a plant "officially" unless you know the parentage. I Stevens case someone else created the cross but never registered it. Steven got permission from the creator to register it, and of course the creator was given credit for making the cross.