View source for Cyperus schweinitzii

{{Treatment/ID
|accepted_name=Cyperus schweinitzii
|accepted_authority=Torrey
|publications={{Treatment/Publication
|title=Ann. Lyceum Nat. Hist. New York
|place=3: 276. 1836
|year=1836
}}
|common_names=Schweinitz’s flatsedge
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Cyperus alterniflorus
|authority=Schweinitz
|rank=species
|publication_title=
|publication_place=1824
}}
|synonyms=
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Cyperus;Cyperus schweinitzii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Cyperus]]</div><div class="higher-taxon"><small>subgenus</small>[[Cyperus subg. Cyperus]]</div><div class="higher-taxon"><small>species</small>[[Cyperus schweinitzii]]</div></div>
|volume=Volume 23
|mention_page=page 144, 145, 147, 175, 176
|treatment_page=page 174
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, rhizomatous. <b>Culms</b> trigonous, (10–)20–50 cm × (0.6–)1–2 mm, glabrous or more often scabridulous, either in distal 1/2 or over entire length; basal sheaths, 1–3, light brown, 1–4 cm, papery. <b>Leaves</b> flat to V-shaped, (2–)20–35 cm × 2–6 mm, margins and keel minutely scabridulous; proximal leaves bladeless. <b>Inflorescences</b>: spikes ± umbellate to slenderly (infrequently broadly) ovoid, 10–25 × 7–16 mm; rays 3–5, 1.5–8(–15) cm; bracts 3–7, erect (or declined at most 25–30° from vertical), (2.5–)8–20(–25) cm × (0.5–)1.5–6 mm; rachilla ± deciduous, wingless. <b>Spikelets</b> (1–)5–10(–20), oblong to linear-oblong, quadrangular, 7–10(–18) × (2.8–)3.2–4(–4.5) mm; floral scales deciduous, (1–)5–10(–14), spreading, laterally stramineous or dull whitish, sometimes also red-spotted, medially green, laterally 2–3-ribbed, medially 3-ribbed, broadly ovate to oblong-ovate, (2.3–)2.8–3.2 × (2–)2.4–3.2 mm, apex broadly rounded, often clear-erose, cusp 0.1–0.4 mm in proximal scales, 0.3–1 mm in distal scales. <b>Flowers</b>: anthers 0.8–1.4 mm; styles 0.1–0.3 mm; stigmas 1.5–3 mm. <b>Achenes</b> light to dark brown or nearly black, broadly ellipsoid, infrequently obovoid, 2–2.4 × 0.9–1.4 mm, base cuneate to ± stipelike, apex obtuse to broadly rounded, surfaces papillose. <b>2n</b> = 166.</span><!--

-->{{Treatment/Body
|phenology=Fruiting late spring–early summer.
|habitat=Riverbanks, sand bars, lakeshores, sand dunes, sandy openings in woods
|elevation=0–1000 m
|distribution=Alta.;Man.;Ont.;Que.;Sask.;Colo.;Ill.;Iowa;Ky.;Mass.;Mich.;Minn.;Mo.;Mont.;N.J.;N.Mex.;N.Y.;Ohio;Okla.;Pa.;S.Dak.;Tex.;Utah;Wash.;Wis.;Wyo.;Mexico (Coahuila).
|discussion=<p><i>Cyperus schweinitzii</i> is introduced, but not naturalized, in Massachusetts and Washington.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Cyperus schweinitzii
|authority=Torrey
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=Cyperus alterniflorus
|family=Cyperaceae
|phenology=Fruiting late spring–early summer.
|habitat=Riverbanks, sand bars, lakeshores, sand dunes, sandy openings in woods
|elevation=0–1000 m
|distribution=Alta.;Man.;Ont.;Que.;Sask.;Colo.;Ill.;Iowa;Ky.;Mass.;Mich.;Minn.;Mo.;Mont.;N.J.;N.Mex.;N.Y.;Ohio;Okla.;Pa.;S.Dak.;Tex.;Utah;Wash.;Wis.;Wyo.;Mexico (Coahuila).
|reference=None
|publication title=Ann. Lyceum Nat. Hist. New York
|publication year=1836
|special status=Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_291.xml
|genus=Cyperus
|subgenus=Cyperus subg. Cyperus
|species=Cyperus schweinitzii
}}<!--

-->[[Category:Treatment]][[Category:Cyperus subg. Cyperus]]