Carex siderostictaHance

WFO wfo-0000351299 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Carex siderosticta, photographed by Nina Filippova
fig. a Nina Filippova, CC BY 4.0 / 2021-09-03 / obs. 157731749
Carex siderosticta, photographed by Nina Filippova
fig. b Nina Filippova, CC BY 4.0 / obs. 157698724
Carex siderosticta, photographed by Nina Filippova
fig. c Nina Filippova, CC BY 4.0 / obs. 155657827
Carex siderosticta, photographed by Nina Filippova
fig. d Nina Filippova, CC BY 4.0 / obs. 153667005
Carex siderosticta, photographed by Nina Filippova
fig. e Nina Filippova, CC BY 4.0 / obs. 153467971
Carex siderosticta, photographed by Nina Filippova
fig. f Nina Filippova, CC BY 4.0 / obs. 153295638
Carex siderosticta, photographed by Nina Filippova
fig. g Nina Filippova, CC BY 4.0 / obs. 153108718
Carex siderosticta, photographed by Nina Filippova
fig. h Nina Filippova, CC BY 4.0 / obs. 152907744

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
04324900
Filed as
Carex siderosticta Hance
Det. by
not recorded on this sheet
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 7 botanical countries

Regions where Carex siderosticta is native: China North-Central, China Southeast, Inner Mongolia, Japan, Korea, Manchuria, Primorye China North-CentralChina SoutheastInner MongoliaJapanManchuriaPrimorye Korea
Native distribution of Carex siderosticta, 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
China North-Central CHN ASIA-TEMPERATE
China Southeast CHS
Inner Mongolia CHI
Japan JAP
Korea KOR
Manchuria CHM
Primorye PRM

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 257 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -22.3 °C -15.7 °C -7.0 °C
Warmest month, mean daily high 21.0 °C 22.9 °C 26.4 °C
Annual rainfall 635 mm 820 mm 1,704 mm
Rainfall in the driest quarter 29 mm 47 mm 139 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 257 research-grade observations of Carex siderosticta 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.

Named cultivars 1 recorded

Selections of Carex siderosticta that somebody named and propagated. A cultivar is not a botanical taxon: it is governed by the cultivated-plant code rather than the botanical one, so it appears in no taxonomic backbone, and it has no native range and no wild population of its own. These get no page here, because a cultivar has no photographs, no range and no flowering data of its own, and a page with none of those is not a page.

From Wikidata (CC0), joined to this species on its World Flora Online identifier, so the link to the parent is exact rather than a name match. This list is what is recorded in an openly licensed register; it is not every cultivar that exists, and for many genera it is not close. Why, and how far short it falls.

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 platyphylla Franch.
  • Carex siderosticta f. albomarginata Y.N.Lee
  • Carex siderosticta f. stenophylla Kitag.
  • Carex siderosticta var. bracteosa Franch.
  • Carex siderosticta var. ciliatomarginata Nakai
  • Carex siderosticta var. glabra Ohwi
  • Carex siderosticta var. stenophylla (Kitag.) Kitag.
  • Carex siderosticta var. variegata Akiyama
  • Pseudocarex plantaginea Miq.

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.