Hypericum gymnanthum Engelmann & A. Gray. Clasping-leaf St. John's-wort. Phen: Jun-Sep. Hab: Pine savannas, wet pine flatwoods, sinkhole ponds (Augusta and Rockingham counties, VA), other wet to moist habitats. Dist: S. NJ south to ne. FL, Panhandle FL, west to c. TX, and scattered inland in PA, WV, sc. TN, OH, IN, IL, MO, and e. KS; also disjunct in Guatemala (introduced?).
Origin/Endemic status: Native
Syn: = Ar, C, F, FNA6, G, GW2, Il, K1, K3, K4, Mo2, NcTx, Pa, RAB, S, Tn, Tx, Va, WH3, Adams (1973), Robson (1985, 1990, 2001, 2002, 2006)