Cyperus rigensJ.Presl & C.Presl

WFO wfo-0000381370 Accepted WFO 2026-06 3 photographs CC BY

Plate 1 figs. a–c · 1 observation

This species has been photographed under an open licence only 1 time, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Cyperus rigens, photographed by Agustina Medina
fig. a Agustina Medina, CC BY 4.0 / 2022-02-12 / obs. 179183341
Cyperus rigens, photographed by Agustina Medina
fig. b Agustina Medina, CC BY 4.0 / obs. 179259989
Cyperus rigens, photographed by Agustina Medina
fig. c Agustina Medina, CC BY 4.0 / obs. 179260035

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.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
602735
Filed as
Cyperus rigens J.Presl & C.Presl
Det. by
G. C. Tucker 2014-01-01
Collected
T. M. Koyama 1970-03-04
Origin
BR
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 10 botanical countries

Regions where Cyperus rigens is native: Argentina Northeast, Argentina Northwest, Bolivia, Brazil North, Brazil South, Brazil West-Central, Chile North, Paraguay, Peru, Uruguay Argentina NortheastArgentina NorthwestBoliviaBrazil NorthBrazil SouthBrazil West-CentralChile NorthParaguayPeruUruguay
Native distribution of Cyperus rigens, 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.
RegionTDWG codeContinent
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Bolivia BOL
Brazil North BZN
Brazil South BZS
Brazil West-Central BZC
Chile North CLN
Paraguay PAR
Peru PER
Uruguay URU

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 26 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.

  • Chlorocyperus oostachyus (Nees) Palla
  • Chlorocyperus serrae (Boeckeler) Palla
  • Cyperus aurescens Boeckeler
  • Cyperus chilensis Boeckeler
  • Cyperus conceptionis Steud.
  • Cyperus lacustris Phil.
  • Cyperus laetus subsp. laetus
  • Cyperus laetus subsp. oostachyus (Nees) Kük.
  • Cyperus laetus var. conceptionis (Steud.) Kük.
  • Cyperus laetus var. parciflorus Kük.
  • Cyperus nocha Phil.
  • Cyperus oostachyus Nees
  • Cyperus paposanus Phil.
  • Cyperus quinquespicatus Boeckeler
  • Cyperus rancoanus Phil.
  • Cyperus rigens var. capitatus J.Presl & C.Presl
  • Cyperus rigens var. latifolius Kük.
  • Cyperus rigens var. rigens
  • Cyperus rigens var. rufidulus (Steud.) Kük.
  • Cyperus rigens var. umbellatus J.Presl & C.Presl
  • Cyperus rufidulus Steud.
  • Cyperus serrae Boeckeler
  • Cyperus serrae var. elongata Boeckeler
  • Cyperus serrae var. minor Boeckeler

and 2 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. 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.