Mapping is provisional. Treatments of variants within this perennial or annual species (2n = 26+) have been inconsistent in recent decades, and further study is needed (Smith 1976; Cr, FNA 21, Y, W). It is probably just planted or adventive in Ky. and Tenn., where most or all plants may be referable to var. harveyana (Gray) Sherff. That segregate was originally centered on the Ozark-Ouachita region, but has spread into eastern states. Var. grandiflora is more restricted to outcrops, and probably absent from Tenn. and Ky. Other segregates occur in southern states. There has also been some confusion with lanceolata; see notes under that name. Open dots indicate plants that may be transitional to lanceolata.