Cyperus flavescens Linnaeus. Yellow Flatsedge. Phen: Jul-Sep. Hab: Low fields, ditches, marshes, especially where seasonally flooded. Dist: Pantropical and warm temperate, north in North America to MA, MI, MO, and KS.
Origin/Endemic status: Native
Syn: = Ar, C, ETx1, FNA23, G, GW1, Il, K1, K3, K4, Mex, Mi, NcTx, NE, NY, Pa, RAB, S, Tn, Tx, Va, W, WH3, WV; > Cyperus flavescens L. var. poaeformis – F; > Cyperus flavescens L. var. poiformis (Pursh) Fernald – Mo1
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© Jay Horn