Cyperus houghtonii Torrey. Houghton's Flatsedge. Phen: Jun-Sep. Hab: Dry upland sites, shale barrens, rock outcrops, perhaps associated with mafic or calcareous rocks. Dist: MA, VT, and QC west to MN, south to w. VA, WV, nc. NC, and nw. IN.
Origin/Endemic status: Native
Synonymy: = C, F, FNA23, G, Il, K1, K3, K4, Mi, NE, NY, Pa, RAB, Va, W
Heliophily: 9
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