Cyperaceae taxon details
Carex yasuii Katsuy.
1677412 (urn:lsid:marinespecies.org:taxname:1677412)
accepted
Species
terrestrial
Katsuyama, T. (2008). Two New Species of Carex (Cyperaceae) from the Ogasawara (Bonin) Islands, Japan. <em>Journal of Japanese Botany.</em> 83(6): 331-338.
page(s): 334 [details] Available for editors
[request]
page(s): 334 [details] Available for editors
[request]
Holotype KPM 0129588, geounit Tokyo
Holotype KPM 0129588, geounit Tokyo [details]
Description Perennial evergreen herbs. Rhizome short, densely caespitose. Culms central, slender, 20–40 cm tall, as long as leaves,...
Distribution JAPAN: The Ogasawara Islands (Chichijima Island). Forest floors. Endemic.
Chichijima Island (父島):...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Jap. Bot. 83(6): 334 (-337; figs. 3-4). 2008 [Dec 2008] to J. Jap....
Description Perennial evergreen herbs. Rhizome short, densely caespitose. Culms central, slender, 20–40 cm tall, as long as leaves, trigonous, smooth. Leaves basal; blades flat, 2–4 mm wide, dark green, scabrous on abaxial side and along margins; basal sheaths with leaf blades, stramineous to brownish, fibrillose. Flowers April to May, inflorescence racemose, with 3–5 spikes, bearing on upper 1/4 to 1/2 of the culm, solitary at node, remote; terminal spike staminate, linear, 25 cm long, 1–1.5 mm wide (Fig. 4 A); lateral spikes pistillate or androgynous with short staminate section above, erect, pedunculate, narrowly cylindrical, 1–3 cm long, 3–4 mm wide, subdensely many-flowered (Fig. 4 B). Bracts setaceous above, lower leafy, blades equalling the spikes, with short sheaths. Staminate scales oblanceolate, 5–6 mm long,年12月成20 white to pale brown, midrib green, acute to short aristate. Pistillate scales narrowly ovate, 3–4 mm long, shorter than perigynia, white to pale brown, midrib green, acuminate to short aristate. Perigynia erect, gourdlike lanceolate, acutely trigonous, 4.5–5.5 mm long, 1–1.2 mm wide, membranaceous, finely many-veined, glabrous, stipitate, attenuate to beaks, margins of beak scabrous, apex bidentate (Fig. 4 C). Achenes tightly enveloped with the perigynia, lanceolate, trigonous, 3.5–4 mm long, brown at maturity, base stoutly stipitate, stipes stramineous, ca. 1 mm long, attenuate to cylindrical neck, neck stramineous, ca. 0.5 mm long, ca. 0.7 mm across, apex truncate to shallowly concave when dried (Fig. 4 D). Styles short, base thickened. Stigmas 3, ca. 2 mm long, caducous. [details]
Distribution JAPAN: The Ogasawara Islands (Chichijima Island). Forest floors. Endemic.
Chichijima Island (父島):...
Distribution JAPAN: The Ogasawara Islands (Chichijima Island). Forest floors. Endemic.
Chichijima Island (父島): https://maps.app.goo.gl/MDKhVcmGCHtvyL1S7 [details]
Chichijima Island (父島): https://maps.app.goo.gl/MDKhVcmGCHtvyL1S7 [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Jap. Bot. 83(6): 334 (-337; figs. 3-4). 2008 [Dec 2008] to J. Jap....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Jap. Bot. 83(6): 334 (-337; figs. 3-4). 2008 [Dec 2008] to J. Jap. Bot. 83: 334 (2008), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex yasuii Katsuy.. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1677412 on 2025-09-12
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2024-12-10 11:47:54Z
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Nomenclature
original description
Katsuyama, T. (2008). Two New Species of Carex (Cyperaceae) from the Ogasawara (Bonin) Islands, Japan. <em>Journal of Japanese Botany.</em> 83(6): 331-338.
page(s): 334 [details] Available for editors [request]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 334 [details] Available for editors
[request]basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype KPM 0129588, geounit Tokyo [details]
From editor or global species database
Description Perennial evergreen herbs. Rhizome short, densely caespitose. Culms central, slender, 20–40 cm tall, as long as leaves, trigonous, smooth. Leaves basal; blades flat, 2–4 mm wide, dark green, scabrous on abaxial side and along margins; basal sheaths with leaf blades, stramineous to brownish, fibrillose. Flowers April to May, inflorescence racemose, with 3–5 spikes, bearing on upper 1/4 to 1/2 of the culm, solitary at node, remote; terminal spike staminate, linear, 25 cm long, 1–1.5 mm wide (Fig. 4 A); lateral spikes pistillate or androgynous with short staminate section above, erect, pedunculate, narrowly cylindrical, 1–3 cm long, 3–4 mm wide, subdensely many-flowered (Fig. 4 B). Bracts setaceous above, lower leafy, blades equalling the spikes, with short sheaths. Staminate scales oblanceolate, 5–6 mm long,年12月成20 white to pale brown, midrib green, acute to short aristate. Pistillate scales narrowly ovate, 3–4 mm long, shorter than perigynia, white to pale brown, midrib green, acuminate to short aristate. Perigynia erect, gourdlike lanceolate, acutely trigonous, 4.5–5.5 mm long, 1–1.2 mm wide, membranaceous, finely many-veined, glabrous, stipitate, attenuate to beaks, margins of beak scabrous, apex bidentate (Fig. 4 C). Achenes tightly enveloped with the perigynia, lanceolate, trigonous, 3.5–4 mm long, brown at maturity, base stoutly stipitate, stipes stramineous, ca. 1 mm long, attenuate to cylindrical neck, neck stramineous, ca. 0.5 mm long, ca. 0.7 mm across, apex truncate to shallowly concave when dried (Fig. 4 D). Styles short, base thickened. Stigmas 3, ca. 2 mm long, caducous. [details]Distribution JAPAN: The Ogasawara Islands (Chichijima Island). Forest floors. Endemic.
Chichijima Island (父島): https://maps.app.goo.gl/MDKhVcmGCHtvyL1S7 [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Jap. Bot. 83(6): 334 (-337; figs. 3-4). 2008 [Dec 2008] to J. Jap. Bot. 83: 334 (2008), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
| Language | Name | |
|---|---|---|
| Japanese | ムニンヒョウタンスゲ（Munin-hyotan-suge） | [details] |
To International Plant Names Index (IPNI)
To Plants of the World Online
To University of Tokyo Herbarium (Carex yasuii type TI00010308)
To Plants of the World Online
To University of Tokyo Herbarium (Carex yasuii type TI00010308)
From editor or global species database
Hosted externally
