Cyperus compressus Linnaeus. Poorland Flatsedge. Phen: Jul-Sep. Hab: Sandy fields, disturbed areas. Dist: Pantropical and warm temperate, north in North America to s. NY, s. OH, s. IL, and e. TX, the northern extent of the native range uncertain. Reported for s. IN by Bill Thomas (pers.comm., 2022).
ID notes: Occasionally mistaken for a member of subgenus Pycreus. The dark black, obviously trigonous achenes and mucronate scales distinguish it easily under a hand lens.
Origin/Endemic status: Native
Synonymy ⓘ: = Ar, Bah, C, ETx1, F, FNA23, G, GW1, Il, K1, K3, K4, Mex, Mo1, NcTx, NY, Pa, RAB, S, Tat, Tn, Tx, Va, W, WH3
Wetland Indicator Status:
Heliophily ⓘ: 9
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