This large-headed taxon is verified only in the southern Appalachians of N.Car., Tenn. and perhaps Ky. F stated: "in less extreme development to D.C. and Ky." Var. rupestris is distinguished from typical triloba as follows (W): ray blades 18-30 mm long (versus 8-17 mm); discs 15-20 mm across (versus 10-15 mm). Further study of its status is needed, with attention to chromosome number; Cr noted that triploids (2n = 57) in triloba are "more northeastern." The only apparent record of var. rupestris from Ky. is a coll. from "Pine Mt. State Park Nature Center" in BELL (KY), which was annotated "triploid" by K. McCrea.