Asl-ul Muqarrar is from the central India orchard of Padamshri Haji Kalimullah Khan, named after a family member. Reportedly heart shaped and of outstanding quality. It may also be spelled Asroor Muqarar.
Given that this is a north Indian cultivar, we are skeptical about its ability to flower in southeast Florida, but hopefully it can surprise us. It has grown very vigorously so far.