Cyperus eragrostisLam.

tall flatsedge

WFO wfo-0000372740 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Cyperus eragrostis, photographed by Mary K. Hanson
fig. a Mary K. Hanson, CC BY 4.0 / 2022-06-12 / obs. 205808269
Cyperus eragrostis, photographed by chiuluan
fig. b chiuluan, CC BY 4.0 / obs. 201943667
Cyperus eragrostis, photographed by Greg Tasney
fig. c Greg Tasney, CC BY-SA 4.0 / obs. 196739102
Cyperus eragrostis, photographed by Grey Smith
fig. d Grey Smith, CC BY 4.0 / obs. 204459968
Cyperus eragrostis, photographed by Ashwin Srinivasan
fig. e Ashwin Srinivasan, CC BY 4.0 / obs. 202879507
Cyperus eragrostis, photographed by Daniela Costa
fig. f Daniela Costa, CC BY 4.0 / obs. 201963467
Cyperus eragrostis, photographed by Ken-ichi Ueda
fig. g Ken-ichi Ueda, CC BY 4.0 / obs. 199521044
Cyperus eragrostis, photographed by Jenny Saito
fig. h Jenny Saito, CC BY 4.0 / obs. 197685105

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.

Flowering n = 544 observations

Peak flowering in Jun, from 544 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 22 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 eragrostis (Lam.) Rikli
  • Cyperus declinatus Moench
  • Cyperus declinatus var. limbatus Druce
  • Cyperus eragrostis f. latifrons Kük.
  • Cyperus eragrostis f. rubromarginatus Kük.
  • Cyperus eragrostis f. tener Kük.
  • Cyperus eragrostis var. compactus (Desv.) Kük.
  • Cyperus eragrostis var. eragrostis
  • Cyperus eragrostis var. spectabilis Makino
  • Cyperus gracilis Buchanan
  • Cyperus lutescens Phil.
  • Cyperus luzulae Hochst. ex Steud.
  • Cyperus monandrus Roth
  • Cyperus ochrocephalus Steud.
  • Cyperus prionotropis Steud.
  • Cyperus serrulatus S.Watson
  • Cyperus vegetus Willd.
  • Cyperus vegetus var. compactus Desv.
  • Cyperus vegetus var. limbata C.B.Clarke
  • Cyperus vegetus var. obtusangulus Kuntze
  • Cyperus vegetus var. triangularis Boeckeler
  • Cyperus vegetus var. trigonus Kuntze

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.

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