Carex pisiformisBoott

thread sedge

WFO wfo-0000350095 Accepted WFO 2026-06 6 photographs CC BY / CC BY-SA

Plate 1 figs. a–f · 2 observations

This species has been photographed under an open licence only 2 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 pisiformis, photographed by Eric Knight
fig. a Eric Knight, CC BY 4.0 / 2018-04-19 / obs. 17492890
Carex pisiformis, photographed by Eric Knight
fig. b Eric Knight, CC BY 4.0 / obs. 17492870
Carex pisiformis, photographed by Eric Knight
fig. c Eric Knight, CC BY 4.0 / obs. 17492860
Carex pisiformis, photographed by Eric Knight
fig. d Eric Knight, CC BY 4.0 / obs. 17492832
Carex pisiformis, photographed by harum.koh
fig. e harum.koh, CC BY-SA 4.0 / obs. 125757593
Carex pisiformis, photographed by harum.koh
fig. f harum.koh, CC BY-SA 4.0 / obs. 125757636

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 4 botanical countries

Regions where Carex pisiformis is native: China North-Central, China Southeast, Japan, Korea China North-CentralChina SoutheastJapan Korea
Native distribution of Carex pisiformis, 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
Japan JAP
Korea KOR

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.

Also published as 13 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 amphora Franch. & Sav.
  • Carex bauhwaensis Z.P.Wang
  • Carex clivorum Ohwi
  • Carex dandoensis T.Koyama
  • Carex hezhouensis H.Wang & S.N.Wang
  • Carex indistincta H.Lév. & Vaniot
  • Carex pisiformis f. polyschoena (H.Lév. & Vaniot) Kük.
  • Carex pisiformis var. pallescens Kük.
  • Carex pisiformis var. pisiformis
  • Carex polyschoena H.Lév. & Vaniot
  • Carex polyschoenoides K.T.Fu
  • Carex polyschoenoides var. fractiflexa Y.C.Yang
  • Carex tenuissima Boott

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.