Here’s an orgy, or to put it more chastely, a dance of Delosperma cooperi, common name, hardy ice plant.
This specimen, which grows happily in Einsteinville, is a member of the Aizoaceae family (stone plants), and related to Carpobrotus edulis, the ice plant which spread through California. The ice plants, whether of the type which line Highway 101 or survive New Jersey winters, are of South African origin.