View source for Cyperus retroflexus

{{Treatment/ID
|accepted_name=Cyperus retroflexus
|accepted_authority=Buckley
|publications={{Treatment/Publication
|title=Proc. Acad. Nat. Sci. Philadelphia.
|place=14: 9. 1862
|year=1862
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Cyperus uniflorus var. floribundus
|authority=Kükenthal
|rank=variety
}} {{Treatment/ID/Synonym
|name=Cyperus uniflorus var. retroflexus
|authority=(Buckley) Kükenthal
|rank=variety
}} {{Treatment/ID/Synonym
|name=Mariscus uniflorus
|authority=
|rank=species
}}
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Cyperus;Cyperus retroflexus
|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 retroflexus]]</div></div>
|volume=Volume 23
|mention_page=page 186
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, cespitose, rhizomatous. <b>Culms</b> trigonous, basally tuberous-thickened, (5–)15–40(–80) cm × 1–2.5 mm, glabrous. <b>Leaves</b> flat to V-shaped, (5–)10–30(–60) cm × (0.5–)1–3(–4) mm. <b>Inflorescences</b>: spike 1, loosely to densely ovoid to cylindric, 8–36 × 8–20 mm; rays 3–6(–9), (5–)10–32 cm; bracts 3–6, horizontal to ascending at 30°, V-shaped, (1–)3–15(–30) cm × 0.5–4.5 mm; rachilla deciduous, wings 0.5–0.7 mm wide. <b>Spikelets</b> (5–)20–35(–65), linear to oblong (without narrowed basal portion), quadrangular; (2.2–)4–10(–18) × 0.7–1.1 mm; floral scales persistent, 1–5, appressed, pale greenish white laterally, stramineous with reddish dots, or deep red, greenish or light brown medially, 3–6-ribbed laterally, narrowly ovate to oblong-elliptic, 2.6–3.9 × 1.6–2 mm, apex rounded to ± acute, entire, mucronulate; distal scale with glabrous midrib and mucro 0.1–0.3(–0.5) mm; sterile terminal scale of spikelet only 0.4–0.6 mm wide, involute, frequently uncinate. <b>Flowers</b>: anthers (0.3–)0.4–0.6 mm; styles 0.4–0.5 mm; stigmas 0.5–0.9 mm. <b>Achenes</b> light brown to reddish brown, sessile or slightly stipitate, ellipsoid, (1.8–)2–2.4 × 0.6–0.8(–0.9) mm, apex slightly apiculate, surfaces puncticulate.</span><!--

-->{{Treatment/Body
|phenology=Fruiting mid summer–early fall (Jul–Sep).
|habitat=Damp, disturbed soils, croplands
|elevation=0–1000 m
|distribution=Ala.;Ariz.;Ark.;Miss.;Mo.;N.Mex.;Okla.;Tex.;Mexico.
|discussion=<p><i>Cyperus retroflexus</i> is distinguished from other species of <i>Cyperus</i> with deciduous spikelets by the involute, sterile terminal scale of the spikelet. In plants with cuspidate scales, the terminal scale is usually somewhat recurved, giving the appearance of a hook at the end of the spikelet.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Cyperus retroflexus
|authority=Buckley
|rank=species
|parent rank=subgenus
|synonyms=Cyperus uniflorus var. floribundus;Cyperus uniflorus var. retroflexus;Mariscus uniflorus
|basionyms=
|family=Cyperaceae
|phenology=Fruiting mid summer–early fall (Jul–Sep).
|habitat=Damp, disturbed soils, croplands
|elevation=0–1000 m
|distribution=Ala.;Ariz.;Ark.;Miss.;Mo.;N.Mex.;Okla.;Tex.;Mexico.
|reference=None
|publication title=Proc. Acad. Nat. Sci. Philadelphia.
|publication year=1862
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_321.xml
|genus=Cyperus
|subgenus=Cyperus subg. Cyperus
|species=Cyperus retroflexus
}}<!--

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