View source for Cyperus difformis

{{Treatment/ID
|accepted_name=Cyperus difformis
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Cent. Pl. II,
|place=6. 1756
|year=1756
}}
|common_names=Variable flatsedge
|special_status={{Treatment/ID/Special_status
|code=W2
|label=
}}{{Treatment/ID/Special_status
|code=W1
|label=
}}{{Treatment/ID/Special_status
|code=I
|label=Introduced
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Cyperus lateriflorus
|authority=Torrey
|rank=species
}}
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Pycnostachys;Cyperus difformis
|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. Pycnostachys]]</div><div class="higher-taxon"><small>species</small>[[Cyperus difformis]]</div></div>
|volume=Volume 23
|mention_page=page 143, 157
|treatment_page=page 156
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, cespitose. <b>Culms</b> 1–15, trigonous, 7–30 cm × 1.2–2.5 mm, soft (flattened in pressing), glabrous. <b>Leaves</b> 2–7, flat, (2–)7–22 cm × 2.2–4 mm. <b>Inflorescences</b>: heads dense, 7–17 mm diam.; when rays short, heads sessile or nearly so, then densely irregularly lobate, 12–35 mm diam.; rays 1–5, 2–32 mm; bracts 2–4, longest bract erect or nearly so, appearing as continuation of culm, other bracts horizontal to ascending, 1–22 cm × 0.5–3.5 mm, margins and keel minutely scabridulous. <b>Spikelets</b> 30–120, greenish brown to purplish brown, oblong-ellipsoid, compressed, (2–)3–5(–6) × 0.8–1.2 mm; floral scales (6–)12–20(–30), laterally clear margins, stramineous to deep purple, medially greenish, stramineous, or purplish, laterally ribless, medially 3-ribbed, obovate to orbiculate, 0.6–0.8 × 0.6–0.8 mm, apex mucronulate. <b>Flowers</b>: stamens 1 or 2; anthers ovoid-ellipsoid, 0.1 mm, connective not prolonged; styles 0.1 mm; stigmas 0.1–0.3 mm. <b>Achenes</b> light brown, obovoid-ellipsoid, 0.6–0.8 × 0.3–0.4 mm (as long as subtending scale), base cuneate, apex obtuse, apiculate, surfaces finely reticulate, papillose.</span><!--

-->{{Treatment/Body
|phenology=Fruiting summer.
|habitat=Disturbed, muddy soils, shallow waters
|elevation=0–1000 m
|distribution=Ala.;Ariz.;Calif.;Fla.;Ga.;Idaho;Ky.;La.;Miss.;N.J.;N.Mex.;N.C.;Oreg.;Pa.;S.C.;Tenn.;Tex.;Va.;Mexico;West Indies (Puerto Rico);Central America (Nicaragua;Panama);South America;Eurasia;Indian Ocean Islands;Pacific Islands;Australia.
|introduced=true
|discussion=<p><i>Cyperus difformis</i> is naturalized in the New World and native to the Old World, where it ranges from southern Europe to southern Africa and eastward to Southeast Asia and Australia.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Cyperus difformis
|authority=Linnaeus
|rank=species
|parent rank=subgenus
|synonyms=Cyperus lateriflorus
|basionyms=
|family=Cyperaceae
|phenology=Fruiting summer.
|habitat=Disturbed, muddy soils, shallow waters
|elevation=0–1000 m
|distribution=Ala.;Ariz.;Calif.;Fla.;Ga.;Idaho;Ky.;La.;Miss.;N.J.;N.Mex.;N.C.;Oreg.;Pa.;S.C.;Tenn.;Tex.;Va.;Mexico;West Indies (Puerto Rico);Central America (Nicaragua;Panama);South America;Eurasia;Indian Ocean Islands;Pacific Islands;Australia.
|introduced=true
|reference=None
|publication title=Cent. Pl. II,
|publication year=1756
|special status=W2;W1;Introduced;Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V23/V23_243.xml
|genus=Cyperus
|subgenus=Cyperus subg. Pycnostachys
|species=Cyperus difformis
}}<!--

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