I can only assume that the Besseae aff that was crossed with Carlablackiae had a very wide sinus. Or Carla did. This plant is incredible. The newest leaf is very orange and red which doesn’t come across in photos. They harden off to a very deep green. Plant currently has two inflows, one only just opening up and the other one that may have been open pollinated but I’m not 100% certain. I’m cutting off a couple of older leaves for easier shipping.