Both Buddleja and Acantholimon are considered which level of classification?
Acantholimon Acantholimon (prickly thrift) is a genus of small flowering plants within the plumbago or leadwort family, Plumbaginaceae. They are distributed from southeastern Europe to central Asia and also in South America, but also cultivated elsewhere in rock gardens.
Buddleja perfoliata Buddleja perfoliata is endemic to the xerophytic and subzerophytic grasslands of central Mexico at elevations of 1500 – 2700 m. The species was first named and described by Kunth in 1818.