Cyperaceae taxon details
Carex acocksii C.Archer
1677135 (urn:lsid:marinespecies.org:taxname:1677135)
accepted
Species
recent only
Archer (née Reid), C.; Balkwill, K. (1997). The genus Carex L. (Cyperaceae) in southern Africa: 1. A new species of Subgenus Primocarex Kük. from Northern Cape, with notes on the subgenus. <em>South African Journal of Botany.</em> 63(6): 342-344., available online at https://doi.org/10.1016/s0254-6299(15)30783-3 [details]
Holotype PRE 0762273-0, geounit Northern Cape Province
Holotype PRE 0762273-0, geounit Northern Cape Province [details]
Description Rhizome loosely cespitose, slender, brown. Flowering culms 14–40(47) cm long, bulbiform at the base, erect, terete and...
Distribution Endemic to the Northern Cape province in South Africa [27 CPP]
Description Rhizome loosely cespitose, slender, brown. Flowering culms 14–40(47) cm long, bulbiform at the base, erect, terete and prominently ribbed, smooth, leafy only at the base, not reaching the third of the length, 0.6–1.2(1.3) mm wide at the middle. Leaves (0.2)0.6–1.1(1.4) mm wide, much shorter than the inflorescence, moderately rigid, light green or somewhat glaucous, canaliculate or, more frequently, involute in cross-section, scabrous along the margins in all its length; abaxial and adaxial surfaces smooth; ligule 0.8–1.5(2) mm long. Basal sheaths somewhat fibrous, bladeless. Lowest bract of the inflorescence glumaceous or setaceous with glumaceous base, shorter or longer than the inflorescence length, axilating an utricle, not sheathing. Inflorescence reduced to a solitary, androgynous spike (10)15–24(27) × (3)4–6 mm, with the male part usually shorter, rarely equaling the female one. Glumiform perigynia and glumiform cladoprophylls absent. Tubular cladoprophylls absent. Utriculiform cladoprophylls absent. Male glumes (2.3)2.7–4.5(6) × (1.1)1.8–2.7(3) mm, ovate, obovate or elliptical, brown in the upper half and straw-coloured to hyaline in the lower one, acute to acuminate, exceptionally obtuse. Female glumes (4)4.8–6.2(6.7) × (2.1)2.6–4.3(5.2) mm, longer and much wider than utricles, hiding them, widely obovate to suborbicular, single mid-veined, pale to golden-brown with hyaline margins at the upper parts and hyaline to yellowish at the lower ones, usually ending in a mucro up to 2(2.8) mm long, very rarely obtuse to roundate at the apex. Utricles 3.4–4(4.6) × (1.4)1.5–1.9(2.2) mm, unisexual, widely ellipsoid, stipitate, straight, papyraceous, hyaline to pale or golden-brown, translucid, glabrous, smooth, with only a few veins or inconspicuous, suberect and erostrate; rachilla reaching up to the half of the utricle. Achenes 3.2–3.9 × 1.4–2 mm, elliptic, yellowish to dark brown when mature, tipped by a widely pyramidal (mitrate), persistent style base. [details]
Distribution Endemic to the Northern Cape province in South Africa [27 CPP]
Distribution Endemic to the Northern Cape province in South Africa [27 CPP] [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex acocksii C.Archer. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1677135 on 2025-09-12
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2024-12-10 11:47:54Z
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Nomenclature
original description
Archer (née Reid), C.; Balkwill, K. (1997). The genus Carex L. (Cyperaceae) in southern Africa: 1. A new species of Subgenus Primocarex Kük. from Northern Cape, with notes on the subgenus. <em>South African Journal of Botany.</em> 63(6): 342-344., available online at https://doi.org/10.1016/s0254-6299(15)30783-3 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Taxonomy
taxonomy source
Gehrke, B. (2011). Synopsis of Carex (Cyperaceae) from sub-Saharan Africa and Madagascar. <em>Botanical Journal of the Linnean Society.</em> 166(1): 51-99., available online at https://doi.org/10.1111/j.1095-8339.2011.01116.x
note: Superseded by Luceño et al.'s (2021) monographic work [details]
taxonomy source Luceño, M.; Villaverde, T.; Márquez-Corro, J. I.; Sánchez-Villegas, R.; Maguilla, E.; Escudero, M.; Jiménez-Mejías, P.; Sánchez-Villegas, M.; Miguez, M.; Benítez-Benítez, C.; Muasya, A. M.; Martín-Bravo, S. (2021). An integrative monograph of <i>Carex</i> section <i>Schoenoxiphium</i> (Cyperaceae). <em>PeerJ.</em> 9: e11336., available online at https://doi.org/10.7717/peerj.11336 [details] Available for editors
[request]
note: Superseded by Luceño et al.'s (2021) monographic work [details]
taxonomy source Luceño, M.; Villaverde, T.; Márquez-Corro, J. I.; Sánchez-Villegas, R.; Maguilla, E.; Escudero, M.; Jiménez-Mejías, P.; Sánchez-Villegas, M.; Miguez, M.; Benítez-Benítez, C.; Muasya, A. M.; Martín-Bravo, S. (2021). An integrative monograph of <i>Carex</i> section <i>Schoenoxiphium</i> (Cyperaceae). <em>PeerJ.</em> 9: e11336., available online at https://doi.org/10.7717/peerj.11336 [details] Available for editors
[request]Other
additional source
Govaerts, R. (1999). World Checklist of Seed Plants. <em>MIM, Deurne.</em> 3(1, 2a & 2b): 1-1532. [details]
additional source Márquez-Corro, J. I.; Jiménez-Mejías, P.; Helme, N. A.; Luceño, M.; Martín-Bravo, S. (2020). The systematic position of the enigmatic rare South African endemic <i>Carex acocksii</i>: Its relevance on the biogeography and evolution of <i>Carex</i> sect. <i>Schoenoxiphium</i> (Cyperaceae). <em>South African Journal of Botany.</em> 131: 475-483., available online at https://doi.org/10.1016/j.sajb.2020.03.027
note: Phylogeny and biogeography [details] Available for editors [request]
additional source Govaerts, R.; Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges. 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew. [details]
additional source Márquez-Corro, J. I.; Jiménez-Mejías, P.; Helme, N. A.; Luceño, M.; Martín-Bravo, S. (2020). The systematic position of the enigmatic rare South African endemic <i>Carex acocksii</i>: Its relevance on the biogeography and evolution of <i>Carex</i> sect. <i>Schoenoxiphium</i> (Cyperaceae). <em>South African Journal of Botany.</em> 131: 475-483., available online at https://doi.org/10.1016/j.sajb.2020.03.027
note: Phylogeny and biogeography [details] Available for editors
[request]additional source Govaerts, R.; Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges. 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew. [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype PRE 0762273-0, geounit Northern Cape Province [details]
Isotype BM 000611185, geounit Northern Cape Province [details]
Isotype GENT 0000090034770, geounit Northern Cape Province [details]
Isotype K 001044967, geounit Northern Cape Province [details]
Isotype MO 193695, geounit Northern Cape Province [details]
Isotype NBG 0200446-0, geounit Northern Cape Province [details]
Isotype P 00199375, geounit Northern Cape Province [details]
Isotype S 06-20520, geounit Northern Cape Province [details]
Isotype S S-G-10688, geounit Northern Cape Province [details]
Isotype TCD 0000356, geounit Northern Cape Province [details]
From editor or global species database
Description Rhizome loosely cespitose, slender, brown. Flowering culms 14–40(47) cm long, bulbiform at the base, erect, terete and prominently ribbed, smooth, leafy only at the base, not reaching the third of the length, 0.6–1.2(1.3) mm wide at the middle. Leaves (0.2)0.6–1.1(1.4) mm wide, much shorter than the inflorescence, moderately rigid, light green or somewhat glaucous, canaliculate or, more frequently, involute in cross-section, scabrous along the margins in all its length; abaxial and adaxial surfaces smooth; ligule 0.8–1.5(2) mm long. Basal sheaths somewhat fibrous, bladeless. Lowest bract of the inflorescence glumaceous or setaceous with glumaceous base, shorter or longer than the inflorescence length, axilating an utricle, not sheathing. Inflorescence reduced to a solitary, androgynous spike (10)15–24(27) × (3)4–6 mm, with the male part usually shorter, rarely equaling the female one. Glumiform perigynia and glumiform cladoprophylls absent. Tubular cladoprophylls absent. Utriculiform cladoprophylls absent. Male glumes (2.3)2.7–4.5(6) × (1.1)1.8–2.7(3) mm, ovate, obovate or elliptical, brown in the upper half and straw-coloured to hyaline in the lower one, acute to acuminate, exceptionally obtuse. Female glumes (4)4.8–6.2(6.7) × (2.1)2.6–4.3(5.2) mm, longer and much wider than utricles, hiding them, widely obovate to suborbicular, single mid-veined, pale to golden-brown with hyaline margins at the upper parts and hyaline to yellowish at the lower ones, usually ending in a mucro up to 2(2.8) mm long, very rarely obtuse to roundate at the apex. Utricles 3.4–4(4.6) × (1.4)1.5–1.9(2.2) mm, unisexual, widely ellipsoid, stipitate, straight, papyraceous, hyaline to pale or golden-brown, translucid, glabrous, smooth, with only a few veins or inconspicuous, suberect and erostrate; rachilla reaching up to the half of the utricle. Achenes 3.2–3.9 × 1.4–2 mm, elliptic, yellowish to dark brown when mature, tipped by a widely pyramidal (mitrate), persistent style base. [details]Distribution Endemic to the Northern Cape province in South Africa [27 CPP] [details]
To European Nucleotide Archive, ENA (Carex acocksii)
To GenBank (16 nucleotides; 4 proteins)
To International Plant Names Index (IPNI)
To IUCN Red List (Critically Endangered)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Carex acocksii K001044967 holotype 1)
To GenBank (16 nucleotides; 4 proteins)
To International Plant Names Index (IPNI)
To IUCN Red List (Critically Endangered)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Carex acocksii K001044967 holotype 1)
From editor or global species database
Hosted externally
