Cyperaceae taxon details
Carex concava H.B.Yang, Xiao X.Li & G.D.Liu
1676692 (urn:lsid:marinespecies.org:taxname:1676692)
accepted
Species
terrestrial
Yang, H. B. (2016). Carex concava (Carex sect. Rhomboidales, Cyperaceae), a new species from Hainan, China. <em>Phytotaxa.</em> 283(2): 155-162.
page(s): 156 [details] Available for editors
[request]
page(s): 156 [details] Available for editors
[request]
Holotype IBSC, geounit Hainan
Holotype IBSC, geounit Hainan [details]
Description Herbs perennial. Rhizome short, ligneous, covered with dark brown fibrous remains of old leaf sheaths. Culms central,
Description Herbs perennial. Rhizome short, ligneous, covered with dark brown fibrous remains of old leaf sheaths. Culms central,
20–45 × ca. 0.2 cm, trigonous. Leaves basal, longer than culms, with ca. 5 cm long sheaths at base; blades green, 5–75
× 0.5–1 cm, glabrous on both surfaces, acuminate at apex. Involucral bracts shortly, leafy, 15–23 × ca. 0.3 cm, sheathed;
sheaths ca. 5 cm long. Inflorescence paniculate, with 3 spikes; terminal spike staminate, linear-cylindrical, 2–6 × ca.
0.2 cm, with a peduncle 4–14 cm long; lateral spikes pistillate, linear-cylindrical, 3–6 × ca. 0.5 cm, loosely flowered,
pedunculate; peduncles exserted from sheaths, 8–15 cm long. Staminate glumes ovate, ca. 4 × 2 mm, membranous,
glabrous, obtuse at apex, with a green 1-veined costa excurrent into a shortly awn ca. 0.3 mm. Pistillate glumes ovate,
yellowish white, ca. 4 × ca. 2 mm, membranous, obtuse at apex, with a green 1-veined costa excurrent into a awn ca. 1
mm. Perigynia fusiform, ca. 7 mm long, slightly longer than pistillate glume, obtusely trigonous, sparsely pubescent on
upper veins, distinctly veined, apex gradually contracted into shortly beak, beak sparsely pubescent on veins. Nutlets
tightly enveloped, rhombic-oval, trigonous, ca. 4 × ca. 2 mm, brownish black, with 3 angles deeply constricted at the
middle, the adaxial side deeply concave below the constriction, apex abruptly contracted into a cylindrical, slightly
curved short beak, expanding into an annulate orifice; style-base persistent, thickened. [details]
20–45 × ca. 0.2 cm, trigonous. Leaves basal, longer than culms, with ca. 5 cm long sheaths at base; blades green, 5–75
× 0.5–1 cm, glabrous on both surfaces, acuminate at apex. Involucral bracts shortly, leafy, 15–23 × ca. 0.3 cm, sheathed;
sheaths ca. 5 cm long. Inflorescence paniculate, with 3 spikes; terminal spike staminate, linear-cylindrical, 2–6 × ca.
0.2 cm, with a peduncle 4–14 cm long; lateral spikes pistillate, linear-cylindrical, 3–6 × ca. 0.5 cm, loosely flowered,
pedunculate; peduncles exserted from sheaths, 8–15 cm long. Staminate glumes ovate, ca. 4 × 2 mm, membranous,
glabrous, obtuse at apex, with a green 1-veined costa excurrent into a shortly awn ca. 0.3 mm. Pistillate glumes ovate,
yellowish white, ca. 4 × ca. 2 mm, membranous, obtuse at apex, with a green 1-veined costa excurrent into a awn ca. 1
mm. Perigynia fusiform, ca. 7 mm long, slightly longer than pistillate glume, obtusely trigonous, sparsely pubescent on
upper veins, distinctly veined, apex gradually contracted into shortly beak, beak sparsely pubescent on veins. Nutlets
tightly enveloped, rhombic-oval, trigonous, ca. 4 × ca. 2 mm, brownish black, with 3 angles deeply constricted at the
middle, the adaxial side deeply concave below the constriction, apex abruptly contracted into a cylindrical, slightly
curved short beak, expanding into an annulate orifice; style-base persistent, thickened. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex concava H.B.Yang, Xiao X.Li & G.D.Liu. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1676692 on 2025-09-14
Date
action
by
2024-12-10 11:47:54Z
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db_admin
The webpage text is licensed under a Creative Commons
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Nomenclature
original description
Yang, H. B. (2016). Carex concava (Carex sect. Rhomboidales, Cyperaceae), a new species from Hainan, China. <em>Phytotaxa.</em> 283(2): 155-162.
page(s): 156 [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): 156 [details] Available for editors
[request]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]
[request]
Present Inaccurate Introduced: alien Containing type locality
Holotype IBSC, geounit Hainan [details]
From editor or global species database
Description Herbs perennial. Rhizome short, ligneous, covered with dark brown fibrous remains of old leaf sheaths. Culms central, 20–45 × ca. 0.2 cm, trigonous. Leaves basal, longer than culms, with ca. 5 cm long sheaths at base; blades green, 5–75
× 0.5–1 cm, glabrous on both surfaces, acuminate at apex. Involucral bracts shortly, leafy, 15–23 × ca. 0.3 cm, sheathed;
sheaths ca. 5 cm long. Inflorescence paniculate, with 3 spikes; terminal spike staminate, linear-cylindrical, 2–6 × ca.
0.2 cm, with a peduncle 4–14 cm long; lateral spikes pistillate, linear-cylindrical, 3–6 × ca. 0.5 cm, loosely flowered,
pedunculate; peduncles exserted from sheaths, 8–15 cm long. Staminate glumes ovate, ca. 4 × 2 mm, membranous,
glabrous, obtuse at apex, with a green 1-veined costa excurrent into a shortly awn ca. 0.3 mm. Pistillate glumes ovate,
yellowish white, ca. 4 × ca. 2 mm, membranous, obtuse at apex, with a green 1-veined costa excurrent into a awn ca. 1
mm. Perigynia fusiform, ca. 7 mm long, slightly longer than pistillate glume, obtusely trigonous, sparsely pubescent on
upper veins, distinctly veined, apex gradually contracted into shortly beak, beak sparsely pubescent on veins. Nutlets
tightly enveloped, rhombic-oval, trigonous, ca. 4 × ca. 2 mm, brownish black, with 3 angles deeply constricted at the
middle, the adaxial side deeply concave below the constriction, apex abruptly contracted into a cylindrical, slightly
curved short beak, expanding into an annulate orifice; style-base persistent, thickened. [details]
