Cyperus lupulinus(Biehler) Marcks

Great Plains flatsedge

WFO wfo-0000377319 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Cyperus lupulinus, photographed by Quinten Wiegersma
fig. a Quinten Wiegersma, CC BY 4.0 / 2021-08-31 / obs. 154383553
Cyperus lupulinus, photographed by Lynn Harper
fig. b Lynn Harper, CC0 1.0 / obs. 151512452
Cyperus lupulinus, photographed by Quinten Wiegersma
fig. c Quinten Wiegersma, CC BY 4.0 / obs. 149918841
Cyperus lupulinus, photographed by aarongunnar
fig. d aarongunnar, CC BY 4.0 / obs. 171520508
Cyperus lupulinus, photographed by Reuven Martin
fig. e Reuven Martin, CC0 1.0 / obs. 147790910
Cyperus lupulinus, photographed by Lynn Harper
fig. f Lynn Harper, CC0 1.0 / obs. 144190767
Cyperus lupulinus, photographed by botany08
fig. g botany08, CC BY 4.0 / obs. 96224985
Cyperus lupulinus, photographed by Lynn Harper
fig. h Lynn Harper, CC0 1.0 / obs. 90126914

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 37 botanical countries

Regions where Cyperus lupulinus is native: Arkansas, Colorado, Connecticut, Delaware, District of Columbia, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, New Brunswick, New Hampshire, New Jersey, New York, North Carolina, Nova Scotia, Ohio, Ontario, Oregon, Pennsylvania, Québec, Rhode I., Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin ArkansasColoradoConnecticutGeorgiaIdahoIllinoisIndianaIowaKansasKentuckyMaineMarylandMassachusettsMichiganMinnesotaMissouriNebraskaNew BrunswickNew HampshireNew JerseyNew YorkNorth CarolinaNova ScotiaOhioOntarioOregonPennsylvaniaQuébecTennesseeTexasVermontVirginiaWest VirginiaWisconsin DelawareDistrict of ColumbiaRhode I.
Native distribution of Cyperus lupulinus, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Arkansas ARK NORTHERN AMERICA
Colorado COL
Connecticut CNT
Delaware DEL
District of Columbia WDC
Georgia GEO
Idaho IDA
Illinois ILL
Indiana INI
Iowa IOW
Kansas KAN
Kentucky KTY
Maine MAI
Maryland MRY
Massachusetts MAS
Michigan MIC
Minnesota MIN
Missouri MSO
Nebraska NEB
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
North Carolina NCA
Nova Scotia NSC
Ohio OHI
Ontario ONT
Oregon ORE
Pennsylvania PEN
Québec QUE
Rhode I. RHO
Tennessee TEN
Texas TEX
Vermont VER
Virginia VRG
West Virginia WVA
Wisconsin WIS

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 9 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Cyperus bushii Britton
  • Cyperus filiculmis var. macilentus Fernald
  • Cyperus houghtonii var. bushii (Britton) Kük.
  • Cyperus lupulinus var. macilentus (Fernald) A.Haines
  • Cyperus macilentus (Fernald) E.P.Bicknell
  • Mariscus cyperiformis (Muhl.) Torr.
  • Mariscus glomeratus W.P.C.Barton
  • Scirpus cyperiformis Muhl.
  • Scirpus lupulinus Biehler

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.