Cyperaceae taxon details
Cyperus acuminatus Torr. & Hook.
1679170 (urn:lsid:marinespecies.org:taxname:1679170)
accepted
Species
Cyperus cyrtolepis Torr. & Hook. · unaccepted
Cyperus cyrtolepis var. caepitosus Boeckeler · unaccepted
Cyperus cyrtolepis var. glaucescens Boeckeler · unaccepted
Cyperus rufescens var. denticarinatus Britton · unaccepted
terrestrial
Torrey, J. (1836). Monograph of North America Cyperaceae. <em>Annals of the Lyceum of Natural History of New York.</em> 3: 239-448., available online at https://www.biodiversitylibrary.org/page/16077440#page/7/mode/1up
page(s): 435 [details]
page(s): 435 [details]
Description Herbs, annual, cespitose. Culms roundly trigonous, (10–)20–30(–45) cm × 0.4–1.2 mm, distal 1/2 glabrous or...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 3: 435 1836 to Ann. Lyceum Nat. Hist....
Description Herbs, annual, cespitose. Culms roundly trigonous, (10–)20–30(–45) cm × 0.4–1.2 mm, distal 1/2 glabrous or infrequently scabridulous. Leaves 2–6(–8), V-shaped or flat, 8–12(–16) cm × 1–2(–4) mm. Inflorescences: heads hemispheric, 7–12(–15) mm diam.; rays 1–3(–5), 0.5–2 cm; bracts 3–6, longest erect to ascending, flat to V-shaped, (1.5–)3–12(–25) cm × 1–2.5(–3.5) mm. Spikelets (15–)25–50(–75), ovoid, compressed, 4–7 × 2–3 mm; floral scales 8–20(–35), laterally yellowish, yellowish green, or light reddish brown, medially light brown or greenish brown, 2-keeled, subtly 1-ribbed, ovate-lanceolate, 1–2 × 1–1.4 mm, apex acute, mucronate, straight to excurved, glabrous or sparsely scabridulous. Flowers: stamen 1; anthers 0.5 mm; styles 0.8–1.1 mm; stigmas 0.5 mm. Achenes brown, stipitate, broadly ellipsoid, abruptly contracted to base, 0.8–1.1 × 0.3–0.4 mm, stipe 0.1 mm, apex acute, tapering to slender beak formed of persistent style base, surfaces papillose. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 3: 435 1836 to Ann. Lyceum Nat. Hist....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 3: 435 1836 to Ann. Lyceum Nat. Hist. New York 3: 435 (1836), 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. Cyperus acuminatus Torr. & Hook.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1679170 on 2026-08-04
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Nomenclature
original description
Torrey, J. (1836). Monograph of North America Cyperaceae. <em>Annals of the Lyceum of Natural History of New York.</em> 3: 239-448., available online at https://www.biodiversitylibrary.org/page/16077440#page/7/mode/1up
page(s): 435 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 435 [details]
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
From editor or global species database
Description Herbs, annual, cespitose. Culms roundly trigonous, (10–)20–30(–45) cm × 0.4–1.2 mm, distal 1/2 glabrous or infrequently scabridulous. Leaves 2–6(–8), V-shaped or flat, 8–12(–16) cm × 1–2(–4) mm. Inflorescences: heads hemispheric, 7–12(–15) mm diam.; rays 1–3(–5), 0.5–2 cm; bracts 3–6, longest erect to ascending, flat to V-shaped, (1.5–)3–12(–25) cm × 1–2.5(–3.5) mm. Spikelets (15–)25–50(–75), ovoid, compressed, 4–7 × 2–3 mm; floral scales 8–20(–35), laterally yellowish, yellowish green, or light reddish brown, medially light brown or greenish brown, 2-keeled, subtly 1-ribbed, ovate-lanceolate, 1–2 × 1–1.4 mm, apex acute, mucronate, straight to excurved, glabrous or sparsely scabridulous. Flowers: stamen 1; anthers 0.5 mm; styles 0.8–1.1 mm; stigmas 0.5 mm. Achenes brown, stipitate, broadly ellipsoid, abruptly contracted to base, 0.8–1.1 × 0.3–0.4 mm, stipe 0.1 mm, apex acute, tapering to slender beak formed of persistent style base, surfaces papillose. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 3: 435 1836 to Ann. Lyceum Nat. Hist. New York 3: 435 (1836), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (16 publications) (from synonym Cyperus cyrtolepis Torr. & Hook.)
To Biodiversity Heritage Library (175 publications)
To European Nucleotide Archive, ENA (Cyperus acuminatus)
To GenBank (7 nucleotides; 3 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis Torr. & Hook.)
To International Plant Names Index (IPNI) (from synonym Cyperus acuminatus var. cyrtolepis (Torr. & Hook.) Kük.)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis var. denticarinatus (Britton) Britton)
To International Plant Names Index (IPNI) (from synonym Cyperus rufescens var. denticarinatus Britton)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis var. caepitosus Boeckeler)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis var. glaucescens Boeckeler)
To New York Botanical Garden Steere Herbarium (Cyperus_cyrtolepis_NY11641_lectotype_1) (from synonym Cyperus cyrtolepis Torr. & Hook.)
To New York Botanical Garden Steere Herbarium (Cyperus_rufescens_denticarinatus_NY11697_holotype_1) (from synonym Cyperus rufescens var. denticarinatus Britton)
To Plants of the World Online (from synonym Cyperus cyrtolepis var. caepitosus Boeckeler)
To Plants of the World Online (from synonym Cyperus cyrtolepis var. glaucescens Boeckeler)
To Plants of the World Online (from synonym Cyperus acuminatus var. cyrtolepis (Torr. & Hook.) Kük.)
To Plants of the World Online (from synonym Cyperus cyrtolepis Torr. & Hook.)
To Plants of the World Online (from synonym Cyperus rufescens var. denticarinatus Britton)
To Plants of the World Online (from synonym Cyperus cyrtolepis var. denticarinatus (Britton) Britton)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Cyperus acuminatus K000950500 type 1)
To Royal Botanic Gardens, Kew (Cyperus acuminatus K000950501 type 1)
To Royal Botanic Gardens, Kew (Cyperus acuminatus K000950502 type 1)
To the Natural History Museum, London (Cyperus acuminatus Torr. & Hook. BM001042019 type 1)
To Biodiversity Heritage Library (175 publications)
To European Nucleotide Archive, ENA (Cyperus acuminatus)
To GenBank (7 nucleotides; 3 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis Torr. & Hook.)
To International Plant Names Index (IPNI) (from synonym Cyperus acuminatus var. cyrtolepis (Torr. & Hook.) Kük.)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis var. denticarinatus (Britton) Britton)
To International Plant Names Index (IPNI) (from synonym Cyperus rufescens var. denticarinatus Britton)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis var. caepitosus Boeckeler)
To International Plant Names Index (IPNI) (from synonym Cyperus cyrtolepis var. glaucescens Boeckeler)
To New York Botanical Garden Steere Herbarium (Cyperus_cyrtolepis_NY11641_lectotype_1) (from synonym Cyperus cyrtolepis Torr. & Hook.)
To New York Botanical Garden Steere Herbarium (Cyperus_rufescens_denticarinatus_NY11697_holotype_1) (from synonym Cyperus rufescens var. denticarinatus Britton)
To Plants of the World Online (from synonym Cyperus cyrtolepis var. caepitosus Boeckeler)
To Plants of the World Online (from synonym Cyperus cyrtolepis var. glaucescens Boeckeler)
To Plants of the World Online (from synonym Cyperus acuminatus var. cyrtolepis (Torr. & Hook.) Kük.)
To Plants of the World Online (from synonym Cyperus cyrtolepis Torr. & Hook.)
To Plants of the World Online (from synonym Cyperus rufescens var. denticarinatus Britton)
To Plants of the World Online (from synonym Cyperus cyrtolepis var. denticarinatus (Britton) Britton)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Cyperus acuminatus K000950500 type 1)
To Royal Botanic Gardens, Kew (Cyperus acuminatus K000950501 type 1)
To Royal Botanic Gardens, Kew (Cyperus acuminatus K000950502 type 1)
To the Natural History Museum, London (Cyperus acuminatus Torr. & Hook. BM001042019 type 1)
