Rick, Eric,
It came from Andy's. It might be the very same plant. I'd love to see a picture of your bloom(s). The synsepalum would seem to confirm its identity. If so, I think we should agree on a clonal name, for future reference. It only seems honest, on the off-chance that the plant should ever get an award, or even be used for breeding.
I thought rhizomatosum is considered synonymous with areeanum.
I have another plant that is labeled P. affine gratrixianum, that I'd like to further identify. It is suggestive of several members of the insigne alliance, but it doesn't seem to fit solidly within any single species.
Regards,
Rick