View source for Carex acutiformis

{{Treatment/ID
|accepted_name=Carex acutiformis
|accepted_authority=Ehrhart
|publications={{Treatment/Publication
|title=Bietr. Naturk.
|place=4: 43. 1789
|year=1789
}}
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms=
|hierarchy=Cyperaceae;Carex;Carex sect. Paludosae;Carex acutiformis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Carex]]</div><div class="higher-taxon"><small>section</small>[[Carex sect. Paludosae]]</div><div class="higher-taxon"><small>species</small>[[Carex acutiformis]]</div></div>
|volume=Volume 23
|mention_page=page 491, 493
|treatment_page=page 494
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>colonial; rhizomes long-creeping. <b>Culms</b> central, coarse, trigonous, 55–130 cm, scabrous-angled. <b>Leaves</b>: basal sheaths pale green to brownish or red tinged; ligules 5–14 mm; blades glaucous, M-shaped, (4.5–)5.5–12(–20) mm wide, glabrous. <b>Inflorescences</b> 15–35 cm; proximal 2–5 spikes pistillate, ascending; distal spikes erect; terminal 1–2(–3) spikes staminate. <b>Pistillate</b> scales lanceolate, acute to acuminate, glabrous, at least the proximal with scabrous awn to 3.5 mm. <b>Perigynia</b> ascending, ± glaucous, often strongly red dotted, ± strongly 12–18-veined, thin-walled, narrowly ovoid, flattened-trigonous, 3–4.5 × 1.4–2.1 mm, glabrous; beak 0.3–0.6 mm, emarginate to weakly bidentulate, teeth to 0.2 mm. <b>2n</b> = 78.</span><!--

-->{{Treatment/Body
|phenology=Fruiting Jun–Aug.
|habitat=Open swamps, wet, open thickets, marsh edges, sedge meadows, lakeshores
|elevation=0–300 m
|distribution=Ont.;Conn.;Ind.;Mass.;Md.;Mich.;N.Y.;Eurasia;Africa.
|introduced=true
|discussion=<p>An uncommon and local introduction, <i>Carex acutiformis</i> forms large, glaucous clones where it is established but is, as yet, not spreading aggressivly into adjacent habitats. It superficially resembles <i>C. aquatilis</i>, but is larger, has 3 stigmas, and has strongly veined perigynia 3–4.5 mm.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Carex acutiformis
|authority=Ehrhart
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Cyperaceae
|phenology=Fruiting Jun–Aug.
|habitat=Open swamps, wet, open thickets, marsh edges, sedge meadows, lakeshores
|elevation=0–300 m
|distribution=Ont.;Conn.;Ind.;Mass.;Md.;Mich.;N.Y.;Eurasia;Africa.
|introduced=true
|reference=None
|publication title=Bietr. Naturk.
|publication year=1789
|special status=Introduced;Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_915.xml
|genus=Carex
|section=Carex sect. Paludosae
|species=Carex acutiformis
}}<!--

-->[[Category:Treatment]][[Category:Carex sect. Paludosae]]