Cyperus lupulinus (Sprengel) Marcks var. lupulinus . Great Plains Flatsedge. Phen: Jul-Sep. Hab: Dry sterile soils in fields and meadows. Dist: MA and VT west to MN, south to NC, n. SC, TX; disjunct in ID, WA, and OR.

Origin/Endemic status: Native

Synonymy: = K4, NE; = Cyperus filiculmis Vahl var. filiculmis – F, G, Mo1, Tat, WV; = Cyperus lupulinus (Spreng.) Marcks ssp. lupulinus – FNA23, GrPl, K1, K3, NY, Va; < Cyperus filiculmis Vahl – RAB, W; >< Cyperus filiculmis Vahl – S; < Cyperus lupulinus (Spreng.) Marcks – Ar, C, ETx1, Il, Mi, NcTx, Pa, Tn; > Cyperus martindalei Britton – S

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: UPL (taxonomic split from wetland indicator species)
• Great Plains: FACU (taxonomic split from wetland indicator species)
• Midwest: FACU (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)

Heliophily: 8