Carex bonariensis

Plate 1 figs. a–g · 5 observations

This species has been photographed under an open licence only 5 times, 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.

Carex bonariensis, photographed by Adriel Magnetti — fig. a Adriel Magnetti, CC0 1.0 / 2022-04-17 / obs. 188796669

Carex bonariensis, photographed by Bahiano Ayala — fig. b Bahiano Ayala, CC BY 4.0 / obs. 135851734

Carex bonariensis, photographed by Hugo Hulsberg — fig. c Hugo Hulsberg, CC0 1.0 / obs. 161742172

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 12 botanical countries

Native distribution of Carex bonariensis, 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.

Region	TDWG code	Continent
Argentina Northeast	AGE	SOUTHERN AMERICA
Argentina Northwest	AGW
Argentina South	AGS
Bolivia	BOL
Brazil South	BZS
Brazil Southeast	BZL
Chile Central	CLC
Chile South	CLS
Ecuador	ECU
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.

Where it actually grows measured, from 65 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	4.9 °C	6.9 °C	8.3 °C
Warmest month, mean daily high	24.7 °C	29.1 °C	30.5 °C
Annual rainfall	1,010 mm	1,109 mm	1,254 mm
Rainfall in the driest quarter	71 mm	149 mm	223 mm

It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 65 research-grade observations of Carex bonariensis that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

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.

Carex bonariensis f. pumila Osten
Carex bonariensis f. remota (Kük.) Kük.
Carex bonariensis var. bonariensis
Carex bonariensis var. remota Kük.
Carex bonariensis var. trachycystis (Griseb.) Kük.
Carex compressa Vahl ex Kunth
Carex papillosa Nees
Carex trachycystis Griseb.
Carex tuberculata Nees ex Boott

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
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.