I can see where your oreophilla guess came from, ie the hoods of the plant are well defined and not as wavy as the traditional catesbaei. However while purpurea does not have too much variation, flava does and certain traits seem to be more consistent within certain variants than others-- for example, var. cuprea seems to have tighter, circular lids and thicker lips. It wouldnt surprise me if a flava cuprea was crossed to make your catesbaei.