Cyperus aggregatus(Willd.) Endl.

inflatedscale flatsedge

WFO wfo-0000367496 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Cyperus aggregatus, photographed by Agustina Medina
fig. a Agustina Medina, CC BY 4.0 / 2022-02-19 / obs. 180032206
Cyperus aggregatus, photographed by Thomas Mesaglio
fig. b Thomas Mesaglio, CC BY 4.0 / obs. 113761796
Cyperus aggregatus, photographed by Fernando Sessegolo
fig. c Fernando Sessegolo, CC0 1.0 / obs. 61127868
Cyperus aggregatus, photographed by Florencia Grattarola
fig. d Florencia Grattarola, CC BY 4.0 / obs. 61141577
Cyperus aggregatus, photographed by Thomas Mesaglio
fig. e Thomas Mesaglio, CC BY 4.0 / obs. 108056294
Cyperus aggregatus, photographed by Guy Taseski
fig. f Guy Taseski, CC BY 4.0 / obs. 62985506
Cyperus aggregatus, photographed by Lena Struwe
fig. g Lena Struwe, CC BY-SA 4.0 / obs. 3664113
Cyperus aggregatus, photographed by Roderick Cameron
fig. h Roderick Cameron, CC BY 4.0 / obs. 75379303

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 46 botanical countries

Regions where Cyperus aggregatus is native: Alabama, Arizona, Louisiana, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Mississippi, New Mexico, Texas, Argentina Northeast, Argentina Northwest, Belize, Bolivia, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Central American Pacific Is., Chile North, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, French Guiana, Guatemala, Guyana, Haiti, Honduras, Jamaica, Leeward Is., Nicaragua, Panamá, Paraguay, Peru, Puerto Rico, Suriname, Trinidad-Tobago, Uruguay, Venezuela, Windward Is. AlabamaArizonaLouisianaMexico CentralMexico GulfMexico NortheastMexico NorthwestMexico SoutheastMexico SouthwestMississippiNew MexicoTexasArgentina NortheastArgentina NorthwestBelizeBoliviaBrazil NorthBrazil NortheastBrazil SouthBrazil SoutheastBrazil West-CentralCentral American Pacific Is.Chile NorthColombiaCosta RicaCubaDominican RepublicEcuadorEl SalvadorFrench GuianaGuatemalaGuyanaHaitiHondurasJamaicaNicaraguaPanamáParaguayPeruPuerto RicoSurinameTrinidad-TobagoUruguayVenezuela Leeward Is.Windward Is.
Native distribution of Cyperus aggregatus, 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
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Belize BLZ
Bolivia BOL
Brazil North BZN
Brazil Northeast BZE
Brazil South BZS
Brazil Southeast BZL
Brazil West-Central BZC
Central American Pacific Is. CPI
Chile North CLN
Colombia CLM
Costa Rica COS
Cuba CUB
Dominican Republic DOM
Ecuador ECU
El Salvador ELS
French Guiana FRG
Guatemala GUA
Guyana GUY
Haiti HAI
Honduras HON
Jamaica JAM
Leeward Is. LEE
Nicaragua NIC
Panamá PAN
Paraguay PAR
Peru PER
Puerto Rico PUE
Suriname SUR
Trinidad-Tobago TRT
Uruguay URU
Venezuela VEN
Windward Is. WIN
Alabama ALA NORTHERN AMERICA
Arizona ARI
Louisiana LOU
Mexico Central MXC
Mexico Gulf MXG
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southeast MXT
Mexico Southwest MXS
Mississippi MSI
New Mexico NWM
Texas TEX

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 42 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.

  • Carex sieberi Nees ex Kunth
  • Cyperus argentinus Boeckeler
  • Cyperus bracteiferus Steud.
  • Cyperus cayennensis (Lam.) Britton
  • Cyperus cayennensis var. argentinus (Boeckeler) Kük. ex Barros
  • Cyperus cayennensis var. gigas (Lindm.) Barros
  • Cyperus cayennensis var. umbellato-flavus (C.B.Clarke) Barros
  • Cyperus flavomariscus Griseb.
  • Cyperus flavus (Vahl) Nees
  • Cyperus flavus var. aggregatus (Willd.) Kük.
  • Cyperus flavus var. angustatus Kük.
  • Cyperus flavus var. argentina (Boeckeler) Kük. ex Osten
  • Cyperus flavus var. australis Osten
  • Cyperus flavus var. genuina Osten
  • Cyperus flavus var. gigas (Lindm.) Kük.
  • Cyperus flavus var. laevis (Kunth) Kük.
  • Cyperus flavus var. obesus (Liebm.) Kük.
  • Cyperus obesus Liebm.
  • Cyperus productus C.Wright
  • Cyperus retrorsus var. australis (Lindm.) Kük.
  • Didymia cyperomorpha Phil.
  • Kyllinga cayennensis Lam.
  • Kyllinga squarrosa Baldwin
  • Mariscus aggregatus Willd.

and 18 more.

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.