Carex projectaMack.

necklace sedge

WFO wfo-0000350281 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Carex projecta, photographed by Quinten Wiegersma
fig. a Quinten Wiegersma, CC BY 4.0 / 2021-07-11 / obs. 143669701
Carex projecta, photographed by Marc-Aurèle Vallée
fig. b Marc-Aurèle Vallée, CC0 1.0 / obs. 111147691
Carex projecta, photographed by Étienne Lacroix-Carignan
fig. c Étienne Lacroix-Carignan, CC0 1.0 / obs. 112276205
Carex projecta, photographed by Quinten Wiegersma
fig. d Quinten Wiegersma, CC BY 4.0 / obs. 52909617
Carex projecta, photographed by Reuven Martin
fig. e Reuven Martin, CC0 1.0 / obs. 44954464
Carex projecta, photographed by Benoit Renaud
fig. f Benoit Renaud, CC BY 4.0 / obs. 205012328
Carex projecta, photographed by Henrique Pacheco
fig. g Henrique Pacheco, CC BY 4.0 / obs. 146184708
Carex projecta, photographed by Étienne Lacroix-Carignan
fig. h Étienne Lacroix-Carignan, CC0 1.0 / obs. 174642966

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
01096868
Filed as
Carex projecta Mack.
Det. by
R. F. C. Naczi 2017-02-10
Collected
R. F. C. Naczi 2013-06-20
Origin
US
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. We link to the digitised sheet rather than rehosting it, because the holding institutions do not serve their images to third parties reliably and we are not going to show you a picture we cannot actually deliver. 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 sheets never recorded a determiner, which is ordinary.

Native range 29 botanical countries

Regions where Carex projecta is native: Connecticut, Illinois, Indiana, Iowa, Labrador, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, North Carolina, Ohio, Ontario, Pennsylvania, Prince Edward I., Québec, Rhode I., Saskatchewan, Tennessee, Vermont, Virginia, West Virginia, Wisconsin ConnecticutIllinoisIndianaIowaLabradorMaineManitobaMarylandMassachusettsMichiganMinnesotaNew BrunswickNew HampshireNew JerseyNew YorkNewfoundlandNorth CarolinaOhioOntarioPennsylvaniaPrince Edward I.QuébecSaskatchewanTennesseeVermontVirginiaWest VirginiaWisconsin Rhode I.
Native distribution of Carex projecta, 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
Connecticut CNT NORTHERN AMERICA
Illinois ILL
Indiana INI
Iowa IOW
Labrador LAB
Maine MAI
Manitoba MAN
Maryland MRY
Massachusetts MAS
Michigan MIC
Minnesota MIN
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
Newfoundland NFL
North Carolina NCA
Ohio OHI
Ontario ONT
Pennsylvania PEN
Prince Edward I. PEI
Québec QUE
Rhode I. RHO
Saskatchewan SAS
Tennessee TEN
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.

Where it actually grows measured, from 330 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -18.8 °C -13.8 °C -8.7 °C
Warmest month, mean daily high 20.4 °C 23.7 °C 25.9 °C
Annual rainfall 803 mm 1,080 mm 1,590 mm
Rainfall in the driest quarter 92 mm 215 mm 330 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 330 research-grade observations of Carex projecta 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.

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.