Carex lachenaliiSchkuhr

Twoparted SedgeTwotipped Sedgetwotipped sedge

WFO wfo-0000348020 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 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 lachenalii, photographed by Jens-Christian Svenning
fig. a Jens-Christian Svenning, CC BY 4.0 / 2021-07-25 / obs. 146171790
Carex lachenalii, photographed by Jens-Christian Svenning
fig. b Jens-Christian Svenning, CC BY 4.0 / obs. 146170538
Carex lachenalii, photographed by Jens-Christian Svenning
fig. c Jens-Christian Svenning, CC BY 4.0 / obs. 146170580
Carex lachenalii, photographed by Trevor Van Loon
fig. d Trevor Van Loon, CC BY 4.0 / obs. 153028715
Carex lachenalii, photographed by Michael D. Pirie
fig. e Michael D. Pirie, CC BY 4.0 / obs. 155374140
Carex lachenalii, photographed by Trevor Van Loon
fig. f Trevor Van Loon, CC BY 4.0 / obs. 153028671
Carex lachenalii, photographed by Dmitriy Bochkov
fig. g Dmitriy Bochkov, CC BY 4.0 / obs. 58935954
Carex lachenalii, photographed by Michael D. Pirie
fig. h Michael D. Pirie, CC BY 4.0 / obs. 155374120

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
03304741
Filed as
Carex lachenalii Schkuhr
Det. by
E. Maguilla 2015-02-01
Collected
not recorded
Origin
not recorded
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 55 botanical countries

Regions where Carex lachenalii is native: Altay, Buryatiya, Japan, Kamchatka, Kazakhstan, Khabarovsk, Korea, Krasnoyarsk, Kuril Is., Magadan, Manchuria, Mongolia, Primorye, Uzbekistan, West Siberia, Yakutiya, New Zealand North, New Zealand South, Austria, Czechia-Slovakia, East European Russia, Finland, France, Great Britain, Iceland, Italy, North European Russia, Norway, NW. Balkan Pen., Poland, Romania, Spain, Svalbard, Sweden, Switzerland, Ukraine, Alaska, Alberta, British Columbia, Colorado, Greenland, Idaho, Labrador, Manitoba, Montana, New Brunswick, New Mexico, Newfoundland, Northwest Territories, Nunavut, Québec, Utah, Washington, Wyoming, Yukon AltayBuryatiyaJapanKamchatkaKazakhstanKhabarovskKrasnoyarskMagadanManchuriaMongoliaPrimoryeUzbekistanWest SiberiaYakutiyaNew Zealand NorthNew Zealand SouthAustriaCzechia-SlovakiaEast European RussiaFinlandFranceIcelandItalyNorth European RussiaNorwayNW. Balkan Pen.PolandRomaniaSpainSvalbardSwedenSwitzerlandUkraineAlaskaAlbertaBritish ColumbiaColoradoGreenlandIdahoLabradorManitobaMontanaNew BrunswickNew MexicoNewfoundlandNorthwest TerritoriesNunavutQuébecUtahWashingtonWyomingYukon Korea
Native distribution of Carex lachenalii, 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
Alaska ASK NORTHERN AMERICA
Alberta ABT
British Columbia BRC
Colorado COL
Greenland GNL
Idaho IDA
Labrador LAB
Manitoba MAN
Montana MNT
New Brunswick NBR
New Mexico NWM
Newfoundland NFL
Northwest Territories NWT
Nunavut NUN
Québec QUE
Utah UTA
Washington WAS
Wyoming WYO
Yukon YUK
Austria AUT EUROPE
Czechia-Slovakia CZE
East European Russia RUE
Finland FIN
France FRA
Great Britain GRB
Iceland ICE
Italy ITA
North European Russia RUN
Norway NOR
NW. Balkan Pen. YUG
Poland POL
Romania ROM
Spain SPA
Svalbard SVA
Sweden SWE
Switzerland SWI
Ukraine UKR
Altay ALT ASIA-TEMPERATE
Buryatiya BRY
Japan JAP
Kamchatka KAM
Kazakhstan KAZ
Khabarovsk KHA
Korea KOR
Krasnoyarsk KRA
Kuril Is. KUR
Magadan MAG
Manchuria CHM
Mongolia MON
Primorye PRM
Uzbekistan UZB
West Siberia WSB
Yakutiya YAK
New Zealand North NZN AUSTRALASIA
New Zealand South NZS

Not drawn on the map: Kuril Is., Great Britain. We hold no public-domain boundary for these regions, so they are listed rather than guessed at.

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 104 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -33.7 °C -17.4 °C -8.0 °C
Warmest month, mean daily high 7.5 °C 11.8 °C 14.8 °C
Annual rainfall 444 mm 1,349 mm 2,121 mm
Rainfall in the driest quarter 60 mm 213 mm 336 mm

It is found where winters are arctic. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 104 research-grade observations of Carex lachenalii 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 23 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 bipartita var. austromontana F.J.Herm.
  • Carex bipartita var. scaber (Akiyama) Akiyama
  • Carex cooptanda C.B.Clarke
  • Carex curvula var. tripartita (All.) Nyman
  • Carex heleonastes var. lachenalii (Schkuhr) Fiori
  • Carex lagopina Wahlenb.
  • Carex lagopina f. angustifolia Norman
  • Carex lagopina f. pauciflora Norman
  • Carex lagopina var. debilis Lange
  • Carex lagopina var. gracilescens Th.Fr.
  • Carex lagopina var. laxior Norman
  • Carex lagopina var. longisquama Kük. ex J.M.Macoun
  • Carex lagopina var. major Lange
  • Carex lagopina var. pleiostachya Drejer
  • Carex lagopina var. scaber Akiyama
  • Carex lagopina var. subtenuiflora Almq.
  • Carex parkeri Petrie
  • Carex parviflora Gaudin
  • Carex sewellii A.Benn. & C.B.Clarke
  • Carex tripartita All.
  • Vignea lachenalii (Schkuhr) Soják
  • Vignea lagopina (Wahlenb.) Rchb.
  • Vignea tripartita (All.) Rchb.

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.