Coreopsis major Walter. Phen: May-Jul. Hab: Dry woodlands, dry and dry-mesic forests, longleaf pine sandhills, roadsides. Dist: W. VA, WV, s. OH, and KY south to GA, FL Panhandle, s. AL, s.MS, and se. LA; disjunct in w. LA.
Origin/Endemic status: Endemic
Taxonomy Comments: How to treat the "Coreopsis major complex" (here including C. major, C. delphiniifolia, and C. verticillata) remains unclear. The group apparently includes diploids and a variety of allopolyploids and autopolyploids (at various ploidies) variously derived from components of C. major and C. verticillata. Sometimes recognized in C. major are two varieties: var. major (with leaf blades rather densely short-pubescent, outer phyllaries rather densely short-pubescent, middle leaflet of median leaves 10-30 mm wide, and leaflets herbaceous) and var. rigida (with leaf blades slightly short-pubescent to glabrous, outer phyllaries slightly short-pubescent to glabrous, middle leaflet of median leaves 5-10 (-12) mm wide, leaflets subcoriaceous and stiff). Variation and poor correlation of these features as stated and the presence of significant and apparently variation in other features requires additional study before a satisfying taxonomy can be presented.
Synonymy: = Fl7, FNA21, K1, K3, K4, NE, NY, Oh3, S, Tn, Va, WH3, Smith (1976); = Coreopsis rigida Nutt.; = n/a – Pa; > Coreopsis major Walter var. linearis Small; > Coreopsis major Walter var. major – C, F, G, RAB, SE1, W, Sherff & Alexander (1955); > Coreopsis major Walter var. rigida – C, F, SE1, Sherff & Alexander (1955); > Coreopsis major Walter var. stellata (Nutt.) B.L.Rob. – F, G, RAB, WV, Sherff & Alexander (1955)