Cyperaceae taxon details
Carex rivulorum Dunn
1676980 (urn:lsid:marinespecies.org:taxname:1676980)
accepted
Species
Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding · unaccepted
terrestrial
Dunn, S. T. (1908). A Botanical Expedition of Central Fokien. <em>The Journal of the Linnean Society.</em> 38: 350-374., available online at https://www.biodiversitylibrary.org/page/174285
page(s): 372 [details]
page(s): 372 [details]
Description Herbs perennial. Rhizome short, ligneous, thick. Culms lateral, 30-80 cm tall, obtusely trigonous, covered with dark brown...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Linn. Soc., Bot. xxxviii. 372 (1908). to J. Linn. Soc., Bot. 38:...
Description Herbs perennial. Rhizome short, ligneous, thick. Culms lateral, 30-80 cm tall, obtusely trigonous, covered with dark brown fibrous sheaths at base. Leaves longer than culms; leaf-blade pale green or yellowish green, flat, revolute, leathery, 1. 5-4. 5 mm wide, acuminate at apex, scabrous on margins. Involucral bracts shortly leaf-like, shorter than inflorescence, sheathed; sheaths 1. 5-2. 5 cm long, obliquely truncate at orifice. Inflorescence paniculate, with 3 or 4 spikes; terminal spike staminate, clavate or clavate-cylindrical, 3. 5-4. 5 cm long, 4-5 mm wide, with a long peduncle at base; lateral spikes androgynous, branched, cylindrical, 3-5 cm long, 10-13 mm wide, densely or slightly densely flowered, bearing a 1. 5-2 cm long staminate part at apex, pedunculate; peduncles exserted from sheaths, or enclosed; branched spikes with a 6-7 staminate part arising from each pistillate flower. Staminate scales oblong-lanceolate, brownish red, 7-8 mm long, acuminate at apex, brown l-veined costa on dorsal surface. Pistillate scales ovate, pale green, 6-6. 5 mm long (including awn), acuminate at apex, green 3-veined costa excurrent into a short scabrous awn. Perigynia broadly ovoid (excluding beak), 6-7. 5 mm long, longer than pistillate scales (including beak), obliquely patent, obtusely trigonous, papery, yellowish green, distinctly veined, glabrous, gradually contracted into a beak; orifice 2-lobed with long teeth. Stigmas 3; style thicken at base. Achenes tightly enveloped, rhombic-ovoid, trigonous, ca. 4 mm long (including beak), yellowish brown or castaneous, sides concave below, shortly slightly curved, stipitate at base, abruptly contracted into a beak at apex, beak slightly curved, annulate at orifice,
[details]
[details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Linn. Soc., Bot. xxxviii. 372 (1908). to J. Linn. Soc., Bot. 38:...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Linn. Soc., Bot. xxxviii. 372 (1908). to J. Linn. Soc., Bot. 38: 372 (1908), 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 rivulorum Dunn. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1676980 on 2025-09-12
Date
action
by
2024-12-10 11:47:54Z
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db_admin
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
Dunn, S. T. (1908). A Botanical Expedition of Central Fokien. <em>The Journal of the Linnean Society.</em> 38: 350-374., available online at https://www.biodiversitylibrary.org/page/174285
page(s): 372 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 372 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
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]
additional source Jin, X. F. & Chao-Zhong, Z. (2013). Taxonomy of Carex sect. Rhomboidales (Cyperaceae). [details] Available for editors [request]
[request]additional source Jin, X. F. & Chao-Zhong, Z. (2013). Taxonomy of Carex sect. Rhomboidales (Cyperaceae). [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
Isotype P 00301930, geounit China [details]
From editor or global species database
Description Herbs perennial. Rhizome short, ligneous, thick. Culms lateral, 30-80 cm tall, obtusely trigonous, covered with dark brown fibrous sheaths at base. Leaves longer than culms; leaf-blade pale green or yellowish green, flat, revolute, leathery, 1. 5-4. 5 mm wide, acuminate at apex, scabrous on margins. Involucral bracts shortly leaf-like, shorter than inflorescence, sheathed; sheaths 1. 5-2. 5 cm long, obliquely truncate at orifice. Inflorescence paniculate, with 3 or 4 spikes; terminal spike staminate, clavate or clavate-cylindrical, 3. 5-4. 5 cm long, 4-5 mm wide, with a long peduncle at base; lateral spikes androgynous, branched, cylindrical, 3-5 cm long, 10-13 mm wide, densely or slightly densely flowered, bearing a 1. 5-2 cm long staminate part at apex, pedunculate; peduncles exserted from sheaths, or enclosed; branched spikes with a 6-7 staminate part arising from each pistillate flower. Staminate scales oblong-lanceolate, brownish red, 7-8 mm long, acuminate at apex, brown l-veined costa on dorsal surface. Pistillate scales ovate, pale green, 6-6. 5 mm long (including awn), acuminate at apex, green 3-veined costa excurrent into a short scabrous awn. Perigynia broadly ovoid (excluding beak), 6-7. 5 mm long, longer than pistillate scales (including beak), obliquely patent, obtusely trigonous, papery, yellowish green, distinctly veined, glabrous, gradually contracted into a beak; orifice 2-lobed with long teeth. Stigmas 3; style thicken at base. Achenes tightly enveloped, rhombic-ovoid, trigonous, ca. 4 mm long (including beak), yellowish brown or castaneous, sides concave below, shortly slightly curved, stipitate at base, abruptly contracted into a beak at apex, beak slightly curved, annulate at orifice,[details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. Linn. Soc., Bot. xxxviii. 372 (1908). to J. Linn. Soc., Bot. 38: 372 (1908), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (1 publication) (from synonym Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding)
To Biodiversity Heritage Library (4 publications)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding)
To Plants of the World Online
To Plants of the World Online (from synonym Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding)
To Biodiversity Heritage Library (4 publications)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding)
To Plants of the World Online
To Plants of the World Online (from synonym Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding)
