Cyperaceae taxon details
Carex davisii Schwein. & Torr.
1676787 (urn:lsid:marinespecies.org:taxname:1676787)
accepted
Species
Carex albirostris C.B.Clarke · unaccepted
Carex aristata Dewey · unaccepted
Carex torreyana Dewey · unaccepted
Loxotrema davisii (Schwein. & Torr.) Raf. · unaccepted
- Forma Carex davisii f. glabrescens Kük. accepted as Carex albicans var. albicans
terrestrial
Schweinitz, L. D. & Torrey, J. (1825). Monograph of the North American species of <i>Carex</i>. <em>Annals of the Lyceum of Natural History of New York.</em> 1(2): 283-373., available online at https://www.biodiversitylibrary.org/page/15913548#page/311/mode/1up
page(s): 326 [details]
page(s): 326 [details]
Description Plants densely cespitose. Culms dark maroon at base; flowering stems 30–100 cm, as long as leaves at maturity or a little...
Description Plants densely cespitose. Culms dark maroon at base; flowering stems 30–100 cm, as long as leaves at maturity or a little shorter, 1.5–3 mm thick, glabrous or pubescent on angles. Leaves: basal sheaths maroon, bladeless, sheaths pubescent or rarely glabrous; others grading from maroon to green on back, light brown-hyaline on front, red dotted and usually pubescent distally, prolonged at apex; blades flat, 3–8 mm wide, usually pubescent on abaxial surface at least near sheath, minutely scabrous on margins. Inflorescences: peduncles of proximal spikes slender, 10–25 mm, pubescent; peduncle of terminal spike 10–30 mm, pubescent; proximal bracts equaling or often exceeding inflorescences; sheaths 15–45 mm; blades 2–6 mm wide. Lateral spikes 2–4, 1 per node, well separated or distal 2 usually overlapping terminal spike, mostly erect when young but at least proximal spikes nodding at maturity, pistillate with 10–40 perigynia attached 1 mm apart distally and to 4 mm apart proximally, cylindric, 10–50 × 3.5–6 mm. Terminal spike gynecandrous, sessile or pedunculate, 15–35 × 2–6 mm. Pistillate scales pale hyaline with broad green midrib, elliptic or ovate-lanceolate, body shorter than mature perigynia but extending into pubescent green awn 2.5–3 mm, often short-ciliate near apex. Perigynia green to olive-green, often red dotted, 2-ribbed with 9–12 almost equally prominent, evenly spaced veins extending from base to apex, slightly inflated around achene, ellipsoid-ovoid, 4.5–6 × 2–2.5 mm, membranous, base rounded, apex narrowing abruptly to minute beak, glabrous; beak bidentate, less than 0.5 mm. Achenes distinctly stipitate, 2.2–2.7 × 1–1.2 mm, stipe 1 mm. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex davisii Schwein. & Torr.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1676787 on 2026-05-25
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2024-12-10 11:47:54Z
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Nomenclature
original description
Schweinitz, L. D. & Torrey, J. (1825). Monograph of the North American species of <i>Carex</i>. <em>Annals of the Lyceum of Natural History of New York.</em> 1(2): 283-373., available online at https://www.biodiversitylibrary.org/page/15913548#page/311/mode/1up
page(s): 326 [details]
page(s): 326 [details]
Other
additional source
Ball, P.W.; Reznicek, A.A.; Murray, D.F. (2002). Magnoliophyta: Commelinidae (in part): Cyperaceae. In: Flora of North America. Vol. 23. Oxford University Press, New York., available online at http://floranorthamerica.org/Cyperaceae [details] Available for editors 
[request]
additional source Kükenthal, G. (1909). Cyperaceae-Caricoidae. <em>Das Pflanzenreich: regni vegetabilis conspectus.</em> 38, 4(20)., available online at https://www.biodiversitylibrary.org/page/31618144
page(s): 587 [details]
[request]additional source Kükenthal, G. (1909). Cyperaceae-Caricoidae. <em>Das Pflanzenreich: regni vegetabilis conspectus.</em> 38, 4(20)., available online at https://www.biodiversitylibrary.org/page/31618144
page(s): 587 [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Additional information Glabrous forms are sporadic in the western part of the range and were recognized as Carex davisii forma glabrescens by G. Kükenthal (1909) but do not warrant taxonomic recognition. A single collection of a putative sterile hybrid between C. davisii and C. hirsutella has been reported from Missouri (G. Yatskievych 1999+) but needs further study to confirm the parentage. [details]Biology Fruiting late spring–mid summer. [details]
Description Plants densely cespitose. Culms dark maroon at base; flowering stems 30–100 cm, as long as leaves at maturity or a little shorter, 1.5–3 mm thick, glabrous or pubescent on angles. Leaves: basal sheaths maroon, bladeless, sheaths pubescent or rarely glabrous; others grading from maroon to green on back, light brown-hyaline on front, red dotted and usually pubescent distally, prolonged at apex; blades flat, 3–8 mm wide, usually pubescent on abaxial surface at least near sheath, minutely scabrous on margins. Inflorescences: peduncles of proximal spikes slender, 10–25 mm, pubescent; peduncle of terminal spike 10–30 mm, pubescent; proximal bracts equaling or often exceeding inflorescences; sheaths 15–45 mm; blades 2–6 mm wide. Lateral spikes 2–4, 1 per node, well separated or distal 2 usually overlapping terminal spike, mostly erect when young but at least proximal spikes nodding at maturity, pistillate with 10–40 perigynia attached 1 mm apart distally and to 4 mm apart proximally, cylindric, 10–50 × 3.5–6 mm. Terminal spike gynecandrous, sessile or pedunculate, 15–35 × 2–6 mm. Pistillate scales pale hyaline with broad green midrib, elliptic or ovate-lanceolate, body shorter than mature perigynia but extending into pubescent green awn 2.5–3 mm, often short-ciliate near apex. Perigynia green to olive-green, often red dotted, 2-ribbed with 9–12 almost equally prominent, evenly spaced veins extending from base to apex, slightly inflated around achene, ellipsoid-ovoid, 4.5–6 × 2–2.5 mm, membranous, base rounded, apex narrowing abruptly to minute beak, glabrous; beak bidentate, less than 0.5 mm. Achenes distinctly stipitate, 2.2–2.7 × 1–1.2 mm, stipe 1 mm. [details]
Ecology Floodplain forests; rich deciduous forests and forest margins, usually along streams or in ditches, wooded ravine slopes, meadows, fields and thickets; often associated with calcareous soils. [details]
To Biodiversity Heritage Library (2 publications) (from synonym Carex albirostris C.B.Clarke)
To Biodiversity Heritage Library (253 publications) (from synonym Carex aristata Dewey)
To Biodiversity Heritage Library (6 publications) (from synonym Carex torreyana Dewey)
To Biodiversity Heritage Library (66 publications)
To European Nucleotide Archive, ENA (Carex davisii)
To International Plant Names Index (IPNI) (from synonym Carex albirostris C.B.Clarke)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex aristata Dewey)
To International Plant Names Index (IPNI) (from synonym Carex torreyana Dewey)
To International Plant Names Index (IPNI) (from synonym Loxotrema davisii (Schwein. & Torr.) Raf.)
To New York Botanical Garden Steere Herbarium (Carex_aristata_NY25110_type_1) (from synonym Carex aristata Dewey)
To Plants of the World Online (from synonym Carex torreyana Dewey)
To Plants of the World Online (from synonym Carex aristata Dewey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex albirostris C.B.Clarke)
To Plants of the World Online (from synonym Loxotrema davisii (Schwein. & Torr.) Raf.)
To Biodiversity Heritage Library (253 publications) (from synonym Carex aristata Dewey)
To Biodiversity Heritage Library (6 publications) (from synonym Carex torreyana Dewey)
To Biodiversity Heritage Library (66 publications)
To European Nucleotide Archive, ENA (Carex davisii)
To International Plant Names Index (IPNI) (from synonym Carex albirostris C.B.Clarke)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex aristata Dewey)
To International Plant Names Index (IPNI) (from synonym Carex torreyana Dewey)
To International Plant Names Index (IPNI) (from synonym Loxotrema davisii (Schwein. & Torr.) Raf.)
To New York Botanical Garden Steere Herbarium (Carex_aristata_NY25110_type_1) (from synonym Carex aristata Dewey)
To Plants of the World Online (from synonym Carex torreyana Dewey)
To Plants of the World Online (from synonym Carex aristata Dewey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex albirostris C.B.Clarke)
To Plants of the World Online (from synonym Loxotrema davisii (Schwein. & Torr.) Raf.)
From editor or global species database
Hosted externally, from synonym
