Cyperaceae taxon details
Carex japonica Thunb.
1676513 (urn:lsid:marinespecies.org:taxname:1676513)
accepted
Species
Carex albidibasis T.Koyama · unaccepted > heterotypic synonym
Carex baviensis Franch. · unaccepted
Carex doniana var. minor (Boott) Boott · unaccepted
Carex japonica var. gracilis Franch. · unaccepted
Carex japonica var. minor Boott · unaccepted
Carex japonica var. trichostyles Franch. & Vaniot · unaccepted
Carex japoniciformis Nakai · unaccepted
Carex motoskei Miq. · unaccepted
Carex planiculmis var. urasawae Ohwi · unaccepted
Carex tokioensis Boeckeler · unaccepted
Carex trichostyles Franch. & Sav. · unaccepted
- Subspecies Carex japonica subsp. chlorostachys (C.B.Clarke) T.Koyama accepted as Carex doniana Spreng.
- Subspecies Carex japonica subsp. subtransversa (C.B.Clarke) T.Koyama accepted as Carex subtransversa C.B.Clarke
- Variety Carex japonica var. alopecuroides (D.Don) C.B.Clarke accepted as Carex alopecuroides D.Don represented as Carex alopecuroides D.Don ex Tilloch & Taylor
- Variety Carex japonica var. aphanolepis (Franch. & Sav.) Kük. accepted as Carex aphanolepis Franch. & Sav.
- Variety Carex japonica var. chlorostachys (C.B.Clarke) Kük. accepted as Carex doniana Spreng.
- Variety Carex japonica var. gracilis Franch. accepted as Carex japonica Thunb.
- Variety Carex japonica var. humilis Franch. accepted as Carex aphanolepis Franch. & Sav.
- Variety Carex japonica var. minor Boott accepted as Carex japonica Thunb.
- Variety Carex japonica var. naipiangensis H.Lév. & Vaniot accepted as Carex planiculmis Kom.
- Variety Carex japonica var. phaenocarpa (Franch.) Kük. accepted as Carex phaenocarpa Franch.
- Variety Carex japonica var. trichostyles Franch. & Vaniot accepted as Carex japonica Thunb.
terrestrial
(1784). Flora Japonica. , available online at https://www.biodiversitylibrary.org/page/50709714#page/7/mode/1up
page(s): 38 [details]
page(s): 38 [details]
Description Rhizome short, with slender stolons. Culms laxly tufted, 20-40 cm tall, rather slender, compressed triquetrous, scabrous on...
Distribution Japan, Korea and China
Description Rhizome short, with slender stolons. Culms laxly tufted, 20-40 cm tall, rather slender, compressed triquetrous, scabrous on upper angles, clothed with few brownish and bladeless sheaths at base, sheaths usually split into reticulate fibers. Upper leaves longer than culm, basal leaves usually shorter than culm, blades 3-4 mm wide, slightly stiff, flat, distinctly 2-veined laterally, scabrous on margins, sheathed. Involucral bracts leaflike, lower involucral bracts longer than subtending spike, upper 1 or 2 involucral bracts shorter than subtending spike, not sheathed. Spikes 3 or 4, rather remote; terminal spike male, linear, 2-4 cm, pedunculate; lateral spikes female, oblong-cylindric or oblong, 1-2.5 cm, densely many flowered, lower ones shortly pedunculate, upper ones sessile or nearly sessile. Male glumes pale, lanceolate, ca. 5 mm, membranous, 3-veined, greenish between veins, apex acuminate; female glumes pale or brownish, narrowly ovate, 2.5-3 mm, membranous, 3-veined, greenish between veins, apex acuminate. Utricles yellowish green or stramineous, obliquely patent, elliptic-ovate or ovate, slightly inflated trigonous, 4-4.5 mm, papery, glabrous, slightly shiny, obscurely veined, base broadly cuneate, apex abruptly contracted into a medium-sized to long beak, orifice hyaline-membranous on margins, shortly 2-toothed. Nutlets brownish, slightly loosely enveloped, elliptic or obovate-elliptic, trigonous, ca. 2 mm; style base slightly thickened; stigmas 3. [details]
Distribution Japan, Korea and China
Distribution Japan, Korea and China [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex japonica Thunb.. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1676513 on 2026-05-22
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2024-12-10 11:47:54Z
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Nomenclature
original description
(1784). Flora Japonica. , available online at https://www.biodiversitylibrary.org/page/50709714#page/7/mode/1up
page(s): 38 [details]
original description (of Carex tokioensis Boeckeler) Böckeler, O. (1882). Neue Cyperaceen. <em>Flora.</em> 65(4): 59-64., available online at https://www.biodiversitylibrary.org/page/66710#page/12/mode/1up
page(s): 63 [details]
page(s): 38 [details]
original description (of Carex tokioensis Boeckeler) Böckeler, O. (1882). Neue Cyperaceen. <em>Flora.</em> 65(4): 59-64., available online at https://www.biodiversitylibrary.org/page/66710#page/12/mode/1up
page(s): 63 [details]
Taxonomy
taxonomy source
Lu, Y.; Jin, X.; Ikeda, H.; Yano, O.; Benítez‐Benítez, C.; Chen, W.; Liu, Y.; Jiménez‐Mejías, P.; Yu, M. (2021). Revisiting of <i>Carex</i> sect. <i>Confertiflorae</i> s.l. (Cyperaceae): New data from molecular and morphological evidence and first insights on <i>Carex</i> biogeography in East Asia. <em>Journal of Systematics and Evolution.</em> 59(4): 668-686., available online at https://onlinelibrary.wiley.com/doi/10.1111/jse.12795 [details] Available for editors 
[request]
[request]Other
additional source
Li, B. Z.; Zhang, S. R. (2024). An updated species checklist and taxonomic synopsis of Cyperaceae in China. <em>Biodiversity Science.</em> 32(7): 24106., available online at https://doi.org/10.17520/biods.2024106 [details] Available for editors [request]
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Additional information n =28II, 29II [details]Additional information 2n=62 [details]
Description Rhizome short, with slender stolons. Culms laxly tufted, 20-40 cm tall, rather slender, compressed triquetrous, scabrous on upper angles, clothed with few brownish and bladeless sheaths at base, sheaths usually split into reticulate fibers. Upper leaves longer than culm, basal leaves usually shorter than culm, blades 3-4 mm wide, slightly stiff, flat, distinctly 2-veined laterally, scabrous on margins, sheathed. Involucral bracts leaflike, lower involucral bracts longer than subtending spike, upper 1 or 2 involucral bracts shorter than subtending spike, not sheathed. Spikes 3 or 4, rather remote; terminal spike male, linear, 2-4 cm, pedunculate; lateral spikes female, oblong-cylindric or oblong, 1-2.5 cm, densely many flowered, lower ones shortly pedunculate, upper ones sessile or nearly sessile. Male glumes pale, lanceolate, ca. 5 mm, membranous, 3-veined, greenish between veins, apex acuminate; female glumes pale or brownish, narrowly ovate, 2.5-3 mm, membranous, 3-veined, greenish between veins, apex acuminate. Utricles yellowish green or stramineous, obliquely patent, elliptic-ovate or ovate, slightly inflated trigonous, 4-4.5 mm, papery, glabrous, slightly shiny, obscurely veined, base broadly cuneate, apex abruptly contracted into a medium-sized to long beak, orifice hyaline-membranous on margins, shortly 2-toothed. Nutlets brownish, slightly loosely enveloped, elliptic or obovate-elliptic, trigonous, ca. 2 mm; style base slightly thickened; stigmas 3. [details]
Distribution Japan, Korea and China [details]
| Language | Name | |
|---|---|---|
| Japanese | ヒゴクサ（Higo-kusa） | [details] |
To Biodiversity Heritage Library (1 publication) (from synonym Carex motoskei Miq.)
To Biodiversity Heritage Library (243 publications)
To Biodiversity Heritage Library (7 publications) (from synonym Carex baviensis Franch.)
To Biodiversity Heritage Library (7 publications) (from synonym Carex trichostyles Franch. & Sav.)
To European Nucleotide Archive, ENA (Carex japonica)
To GenBank (20 nucleotides; 7 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex albidibasis T.Koyama)
To International Plant Names Index (IPNI) (from synonym Carex baviensis Franch.)
To International Plant Names Index (IPNI) (from synonym Carex japoniciformis Nakai)
To International Plant Names Index (IPNI) (from synonym Carex motoskei Miq.)
To International Plant Names Index (IPNI) (from synonym Carex japonica var. gracilis Franch.)
To International Plant Names Index (IPNI) (from synonym Carex tokioensis Boeckeler)
To International Plant Names Index (IPNI) (from synonym Carex japonica var. minor Boott)
To International Plant Names Index (IPNI) (from synonym Carex japonica var. trichostyles Franch. & Vaniot)
To International Plant Names Index (IPNI) (from synonym Carex trichostyles Franch. & Sav.)
To International Plant Names Index (IPNI) (from synonym Carex planiculmis var. urasawae Ohwi)
To IUCN Red List (Least Concern)
To Photos of Cyperaceae by Hoshino Labo. from Japan (from synonym Carex albidibasis T.Koyama)
To Plants of the World Online (from synonym Carex baviensis Franch.)
To Plants of the World Online (from synonym Carex albidibasis T.Koyama)
To Plants of the World Online
To Plants of the World Online (from synonym Carex motoskei Miq.)
To Plants of the World Online (from synonym Carex japoniciformis Nakai)
To Plants of the World Online (from synonym Carex doniana var. minor (Boott) Boott)
To Plants of the World Online (from synonym Carex planiculmis var. urasawae Ohwi)
To Plants of the World Online (from synonym Carex japonica var. trichostyles Franch. & Vaniot)
To Plants of the World Online (from synonym Carex trichostyles Franch. & Sav.)
To Plants of the World Online (from synonym Carex tokioensis Boeckeler)
To Plants of the World Online (from synonym Carex japonica var. minor Boott)
To Plants of the World Online (from synonym Carex japonica var. gracilis Franch.)
To Royal Botanic Gardens, Kew (Carex baviensis K000291238 type 1) (from synonym Carex baviensis Franch.)
To University of Tokyo Herbarium (Carex japonicaeformis type TI00010126) (from synonym Carex japoniciformis Nakai)
To Biodiversity Heritage Library (243 publications)
To Biodiversity Heritage Library (7 publications) (from synonym Carex baviensis Franch.)
To Biodiversity Heritage Library (7 publications) (from synonym Carex trichostyles Franch. & Sav.)
To European Nucleotide Archive, ENA (Carex japonica)
To GenBank (20 nucleotides; 7 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex albidibasis T.Koyama)
To International Plant Names Index (IPNI) (from synonym Carex baviensis Franch.)
To International Plant Names Index (IPNI) (from synonym Carex japoniciformis Nakai)
To International Plant Names Index (IPNI) (from synonym Carex motoskei Miq.)
To International Plant Names Index (IPNI) (from synonym Carex japonica var. gracilis Franch.)
To International Plant Names Index (IPNI) (from synonym Carex tokioensis Boeckeler)
To International Plant Names Index (IPNI) (from synonym Carex japonica var. minor Boott)
To International Plant Names Index (IPNI) (from synonym Carex japonica var. trichostyles Franch. & Vaniot)
To International Plant Names Index (IPNI) (from synonym Carex trichostyles Franch. & Sav.)
To International Plant Names Index (IPNI) (from synonym Carex planiculmis var. urasawae Ohwi)
To IUCN Red List (Least Concern)
To Photos of Cyperaceae by Hoshino Labo. from Japan (from synonym Carex albidibasis T.Koyama)
To Plants of the World Online (from synonym Carex baviensis Franch.)
To Plants of the World Online (from synonym Carex albidibasis T.Koyama)
To Plants of the World Online
To Plants of the World Online (from synonym Carex motoskei Miq.)
To Plants of the World Online (from synonym Carex japoniciformis Nakai)
To Plants of the World Online (from synonym Carex doniana var. minor (Boott) Boott)
To Plants of the World Online (from synonym Carex planiculmis var. urasawae Ohwi)
To Plants of the World Online (from synonym Carex japonica var. trichostyles Franch. & Vaniot)
To Plants of the World Online (from synonym Carex trichostyles Franch. & Sav.)
To Plants of the World Online (from synonym Carex tokioensis Boeckeler)
To Plants of the World Online (from synonym Carex japonica var. minor Boott)
To Plants of the World Online (from synonym Carex japonica var. gracilis Franch.)
To Royal Botanic Gardens, Kew (Carex baviensis K000291238 type 1) (from synonym Carex baviensis Franch.)
To University of Tokyo Herbarium (Carex japonicaeformis type TI00010126) (from synonym Carex japoniciformis Nakai)
