Cyperaceae taxon details
Cephalocarpus glabra M.T.Strong
1680417 (urn:lsid:marinespecies.org:taxname:1680417)
accepted
Species
terrestrial
Strong, M. T. (2016). Three New Cyperaceae from the Cuyuni-Mazaruni Region of Guyana (South America). <em>Novon.</em> 24(4): 401-407.
page(s): 401 [details] Available for editors
[request]
page(s): 401 [details] Available for editors
[request]
Holotype BRG, geounit Guyana
Holotype BRG, geounit Guyana [details]
Description Caudex-forming perennial; caudex simple or branched, 4-8 mm thick; roots fibrous, pale brown.
Culms 2.5-5 cm X 0.4-0.6 mm,...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Novon 24(4): 401. 2016 [24 May 2016] to Novon 24: 401 (2016),...
Culms 2.5-5 cm X 0.4-0.6 mm,...
Description Caudex-forming perennial; caudex simple or branched, 4-8 mm thick; roots fibrous, pale brown.
Culms 2.5-5 cm X 0.4-0.6 mm, ascending to spreading or the lowermost often curving-reflexed,
very slender, flattened, 2 or 3 shallowly ribbed on each side, smooth on margins, light greenish brown, glabrous, sheathed by 2 glume-like bracts at base that are scabrous on keel, hidden by the fibrillose leaf bases. Leaves numerous, spreading, spirally arranged, basal, the lowermost often divaricate; sheaths short, herbaceous proximally, submembranous distally, coarsely ribbed, pale green, glabrous, the orifice with membranous band, slightly concave to truncate
on distal sheaths or convex on proximal ones, ligule absent; blades linear, 2-5 cm X 1.1-1.9 mm, straight to slightly curvate, plicate, stiffly herbaceous, antrorsely coarsely scabrous, often with scabrae on the plicate angles distally, green to pale green, glabrous otherwise, the apex acuminate, canaliculatedistally, the plicate angles converging to a callus-like tip. Inflorescence terminal, a single, subcapitate, obdeltoid fascicle of spikelets, 4-6 mm in diam., glabrous; involucral bracts two or three, 5-14 X 0.5-0.8 mm, leaflike, the lowermost 1(2) shortly exceeding the inflorescence; spikelets unisexual, the lowermost 1(2) spikelets in inflorescence fascicle
staminate, (4 to)5 to 10(to 12), narrowly ellipsoid, 3-4.5 X 0.8-1.2 mm, acute to acuminate at base, acuminate at apex, the pistillate spikelets 1 -flowered, staminate 1- to 2-flowered; pistillate spikelet scales spirally arranged, 2-3 X 1-1.2 mm, spreading, thinly herbaceous, smooth, stramineous to pale brown, glabrous, midcosta a single nerve or often with 2 subtending fine nerves, lateral nerves indistinct, the margins escarious; fertile scales terminal, 1 in
pistillate spikelets, 1 or 2 in staminate spikelets, obtuse to broadly so in cross section, mucronate; sterile scales like the fertile, 3 or 4 proximal, often awned; stamens 3, the anthers 1.8-2.2 mm long, truncate at base, long-apiculate, the apiculus 0.5 mm, papillate; style 3 branched, the stigmas elongating and often curling, equaling to exceeding lengt ikelets. Fructification obtusely trigonous, 3-costate, 1.2-1.6 X 0.9-1 mm, obovate, obtuse at base, truncate at apex, finely and faintly longitudinally striate, pale brown to brown; style base conical, 0.6-0.8 mm X 0.6-0.8 mm at base, spongy thickened, often longitudinally ribbed proximally, pale brown; perianth scales 3, obovate to subrounded, 0.1-0.2 mm long, crystalline-ciliate. [details]
Culms 2.5-5 cm X 0.4-0.6 mm, ascending to spreading or the lowermost often curving-reflexed,
very slender, flattened, 2 or 3 shallowly ribbed on each side, smooth on margins, light greenish brown, glabrous, sheathed by 2 glume-like bracts at base that are scabrous on keel, hidden by the fibrillose leaf bases. Leaves numerous, spreading, spirally arranged, basal, the lowermost often divaricate; sheaths short, herbaceous proximally, submembranous distally, coarsely ribbed, pale green, glabrous, the orifice with membranous band, slightly concave to truncate
on distal sheaths or convex on proximal ones, ligule absent; blades linear, 2-5 cm X 1.1-1.9 mm, straight to slightly curvate, plicate, stiffly herbaceous, antrorsely coarsely scabrous, often with scabrae on the plicate angles distally, green to pale green, glabrous otherwise, the apex acuminate, canaliculatedistally, the plicate angles converging to a callus-like tip. Inflorescence terminal, a single, subcapitate, obdeltoid fascicle of spikelets, 4-6 mm in diam., glabrous; involucral bracts two or three, 5-14 X 0.5-0.8 mm, leaflike, the lowermost 1(2) shortly exceeding the inflorescence; spikelets unisexual, the lowermost 1(2) spikelets in inflorescence fascicle
staminate, (4 to)5 to 10(to 12), narrowly ellipsoid, 3-4.5 X 0.8-1.2 mm, acute to acuminate at base, acuminate at apex, the pistillate spikelets 1 -flowered, staminate 1- to 2-flowered; pistillate spikelet scales spirally arranged, 2-3 X 1-1.2 mm, spreading, thinly herbaceous, smooth, stramineous to pale brown, glabrous, midcosta a single nerve or often with 2 subtending fine nerves, lateral nerves indistinct, the margins escarious; fertile scales terminal, 1 in
pistillate spikelets, 1 or 2 in staminate spikelets, obtuse to broadly so in cross section, mucronate; sterile scales like the fertile, 3 or 4 proximal, often awned; stamens 3, the anthers 1.8-2.2 mm long, truncate at base, long-apiculate, the apiculus 0.5 mm, papillate; style 3 branched, the stigmas elongating and often curling, equaling to exceeding lengt ikelets. Fructification obtusely trigonous, 3-costate, 1.2-1.6 X 0.9-1 mm, obovate, obtuse at base, truncate at apex, finely and faintly longitudinally striate, pale brown to brown; style base conical, 0.6-0.8 mm X 0.6-0.8 mm at base, spongy thickened, often longitudinally ribbed proximally, pale brown; perianth scales 3, obovate to subrounded, 0.1-0.2 mm long, crystalline-ciliate. [details]
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Novon 24(4): 401. 2016 [24 May 2016] to Novon 24: 401 (2016),...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Novon 24(4): 401. 2016 [24 May 2016] to Novon 24: 401 (2016), information provided by Alan E. on email Jun. 07 2021 [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Cephalocarpus glabra M.T.Strong. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1680417 on 2025-03-15
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
Strong, M. T. (2016). Three New Cyperaceae from the Cuyuni-Mazaruni Region of Guyana (South America). <em>Novon.</em> 24(4): 401-407.
page(s): 401 [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): 401 [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 BRG, geounit Guyana [details]
From editor or global species database
Description Caudex-forming perennial; caudex simple or branched, 4-8 mm thick; roots fibrous, pale brown.Culms 2.5-5 cm X 0.4-0.6 mm, ascending to spreading or the lowermost often curving-reflexed,
very slender, flattened, 2 or 3 shallowly ribbed on each side, smooth on margins, light greenish brown, glabrous, sheathed by 2 glume-like bracts at base that are scabrous on keel, hidden by the fibrillose leaf bases. Leaves numerous, spreading, spirally arranged, basal, the lowermost often divaricate; sheaths short, herbaceous proximally, submembranous distally, coarsely ribbed, pale green, glabrous, the orifice with membranous band, slightly concave to truncate
on distal sheaths or convex on proximal ones, ligule absent; blades linear, 2-5 cm X 1.1-1.9 mm, straight to slightly curvate, plicate, stiffly herbaceous, antrorsely coarsely scabrous, often with scabrae on the plicate angles distally, green to pale green, glabrous otherwise, the apex acuminate, canaliculatedistally, the plicate angles converging to a callus-like tip. Inflorescence terminal, a single, subcapitate, obdeltoid fascicle of spikelets, 4-6 mm in diam., glabrous; involucral bracts two or three, 5-14 X 0.5-0.8 mm, leaflike, the lowermost 1(2) shortly exceeding the inflorescence; spikelets unisexual, the lowermost 1(2) spikelets in inflorescence fascicle
staminate, (4 to)5 to 10(to 12), narrowly ellipsoid, 3-4.5 X 0.8-1.2 mm, acute to acuminate at base, acuminate at apex, the pistillate spikelets 1 -flowered, staminate 1- to 2-flowered; pistillate spikelet scales spirally arranged, 2-3 X 1-1.2 mm, spreading, thinly herbaceous, smooth, stramineous to pale brown, glabrous, midcosta a single nerve or often with 2 subtending fine nerves, lateral nerves indistinct, the margins escarious; fertile scales terminal, 1 in
pistillate spikelets, 1 or 2 in staminate spikelets, obtuse to broadly so in cross section, mucronate; sterile scales like the fertile, 3 or 4 proximal, often awned; stamens 3, the anthers 1.8-2.2 mm long, truncate at base, long-apiculate, the apiculus 0.5 mm, papillate; style 3 branched, the stigmas elongating and often curling, equaling to exceeding lengt ikelets. Fructification obtusely trigonous, 3-costate, 1.2-1.6 X 0.9-1 mm, obovate, obtuse at base, truncate at apex, finely and faintly longitudinally striate, pale brown to brown; style base conical, 0.6-0.8 mm X 0.6-0.8 mm at base, spongy thickened, often longitudinally ribbed proximally, pale brown; perianth scales 3, obovate to subrounded, 0.1-0.2 mm long, crystalline-ciliate. [details]
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Novon 24(4): 401. 2016 [24 May 2016] to Novon 24: 401 (2016), information provided by Alan E. on email Jun. 07 2021 [details]
