Cyperaceae taxon details
Carex yankouensis X.L.Yu, A.Liu & J.J.Zhou
1805393 (urn:lsid:marinespecies.org:taxname:1805393)
accepted
Species
recent only
Liu, A.; Zhou, J.-J.; Wu, L.; Yu, X.-L. (2025). <i>Carex yankouensis</i>, a new species of Cyperaceae from limestone landform in northern Guangdong, China. <em>PhytoKeys.</em> 254: 77-85., available online at https://doi.org/10.3897/phytokeys.254.140929
page(s): 78 [details] Available for editors
[request]
page(s): 78 [details] Available for editors
[request]
Holotype , geounit Guangdong
Holotype, geounit Guangdong [details]
Description Perennial herbs. Rhizome short, stout. Culms 10–15 cm tall, blunt trigonous, smooth, base clothed with brown fibrous...
Description Perennial herbs. Rhizome short, stout. Culms 10–15 cm tall, blunt trigonous, smooth, base clothed with brown fibrous sheaths. Leaves up to 30 cm long and 15–20(-35) mm wide, longer than culms, blades papery, soft, broadly linear, pale green or yellow-green, flat, margin entire, apex acuminate or tailed, distinctly transverse veins between the leaf veins. Bracts leaflike, much shorter than inflorescence, sheathing. Spikes 4–5, distant, the proximal spike usually nearly basal and far from the distal ones; terminal spike staminate, 1–3(-4) cm, linear, with a peduncle ca. 3 cm; lateral spikes mostly pistillate, sometimes with several male flowers at apex, 1–1.5 × 0.6–0.8 cm, narrowly cylindric, densely flowered, the proximal-most one with a peduncle 3–5 cm, Perennial herbs. Rhizome short, stout. Culms 10–15 cm tall, blunt trigonous, smooth, base clothed with brown fibrous sheaths. Leaves up to 30 cm long and 15–20(-35) mm wide, longer than culms, blades papery, soft, broadly linear, pale green or yellow-green, flat, margin entire, apex acuminate or tailed, distinctly transverse veins between the leaf veins. Bracts leaflike, much shorter than inflorescence, sheathing. Spikes 4–5, distant, the proximal spike usually nearly basal and far from the distal ones; terminal spike staminate, 1–3(-4) cm, linear, with a peduncle ca. 3 cm; lateral spikes mostly pistillate, sometimes with several male flowers at apex, 1–1.5 × .6–0.8 cm, narrowly cylindric, densely flowered, the proximal-most one with a peduncle 3–5 cm, orifice 2-lobed with sharp teeth. Nutlets ca. 2 × 1.5 mm, black-purple, ovate, trigonous, with 3 angles constricted at middle, faces concave at base, the epidermic cells forming an ornamentation of irregular polygons, base curved stipitate, apex abruptly contracted into an oblique beak, beak ca. 1 mm, slightly annulate at orifice; style base slightly thickened; stigmas 3. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex yankouensis X.L.Yu, A.Liu & J.J.Zhou. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1805393 on 2025-09-13
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Nomenclature
original description
Liu, A.; Zhou, J.-J.; Wu, L.; Yu, X.-L. (2025). <i>Carex yankouensis</i>, a new species of Cyperaceae from limestone landform in northern Guangdong, China. <em>PhytoKeys.</em> 254: 77-85., available online at https://doi.org/10.3897/phytokeys.254.140929
page(s): 78 [details] Available for editors [request]
page(s): 78 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Perennial herbs. Rhizome short, stout. Culms 10–15 cm tall, blunt trigonous, smooth, base clothed with brown fibrous sheaths. Leaves up to 30 cm long and 15–20(-35) mm wide, longer than culms, blades papery, soft, broadly linear, pale green or yellow-green, flat, margin entire, apex acuminate or tailed, distinctly transverse veins between the leaf veins. Bracts leaflike, much shorter than inflorescence, sheathing. Spikes 4–5, distant, the proximal spike usually nearly basal and far from the distal ones; terminal spike staminate, 1–3(-4) cm, linear, with a peduncle ca. 3 cm; lateral spikes mostly pistillate, sometimes with several male flowers at apex, 1–1.5 × 0.6–0.8 cm, narrowly cylindric, densely flowered, the proximal-most one with a peduncle 3–5 cm, Perennial herbs. Rhizome short, stout. Culms 10–15 cm tall, blunt trigonous, smooth, base clothed with brown fibrous sheaths. Leaves up to 30 cm long and 15–20(-35) mm wide, longer than culms, blades papery, soft, broadly linear, pale green or yellow-green, flat, margin entire, apex acuminate or tailed, distinctly transverse veins between the leaf veins. Bracts leaflike, much shorter than inflorescence, sheathing. Spikes 4–5, distant, the proximal spike usually nearly basal and far from the distal ones; terminal spike staminate, 1–3(-4) cm, linear, with a peduncle ca. 3 cm; lateral spikes mostly pistillate, sometimes with several male flowers at apex, 1–1.5 × .6–0.8 cm, narrowly cylindric, densely flowered, the proximal-most one with a peduncle 3–5 cm, orifice 2-lobed with sharp teeth. Nutlets ca. 2 × 1.5 mm, black-purple, ovate, trigonous, with 3 angles constricted at middle, faces concave at base, the epidermic cells forming an ornamentation of irregular polygons, base curved stipitate, apex abruptly contracted into an oblique beak, beak ca. 1 mm, slightly annulate at orifice; style base slightly thickened; stigmas 3. [details]
