View source for Cyperus giganteus

{{Treatment/ID
|accepted_name=Cyperus giganteus
|accepted_authority=Vahl
|publications={{Treatment/Publication
|title=Enum. Pl.
|place=2: 364. 1805
|year=1805
}}
|common_names=Mexican papyrus
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms=
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Cyperus;Cyperus giganteus
|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 giganteus]]</div></div>
|volume=Volume 23
|mention_page=page 147, 167, 174
|treatment_page=page 173
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, rhizomatous, stout. <b>Culms</b> roundly trigonous, 200–350 cm × 15–50 mm, glabrous. <b>Leaves</b> bladeless. <b>Inflorescences</b>: spikes loosely cylindric, 15–40 × 8–16 mm; rays 5–8, ascending to erect, stiff,20–30 cm; 2d order rays 5–15 cm; bracts 10–12, ascending at 30–60°, flat, (8–) 20–45 cm × 4–12 mm; 2d order bracts (5–)15–25 cm × 1.5–5 mm; rachilla persistent, separating laterally, remaining firmly attached basally, wings 0.3–0.4 mm wide. <b>Spikelets</b> (15–)50–80, slightly compressed, linear, ± quadrangular, 5–12 × 0.6–1.4 mm; floral scales 8–20, appressed, reddish beside 5-ribbed green medial part, white to hyaline near margins, ovate, 1.8–2.2 × 1.2–1.5 mm, apex acute to obtuse. <b>Flowers</b>: anthers 0.7–1 mm (connective prolonged beyond anther as red subulate appendage 0.2–0.5 mm, its apex sometimes setose); styles 0.2–0.5 mm; stigmas (0.8–)1.2–1.8 mm. <b>Achenes</b> pale brown, sessile, oblong, 0.9–1 × 0.4–0.5 mm, apex scarcely apiculate, surfaces puncticulate.</span><!--

-->{{Treatment/Body
|phenology=Fruiting summer.
|habitat=Stream banks, marshes
|elevation=0–10 m
|distribution=La.;Tex.;Mexico;West Indies;Central America;South America.
|introduced=true
|discussion=<p><i>Cyperus giganteus</i> was erroneously reported from Florida, a misidentification of <i>C. papyrus</i> (R. R. Haynes and A. Lasseigne 1969).</p><!--
--><p>Recently, some nurseries specializing in water plants have begun to offer <i>C. giganteus</i> under the name “Mexican papyrus.” Escaped cultivated plants may be expected in southeastern and southwestern United States.</p>
|tables=
|references={{Treatment/Reference
|id=haynes1969a
|text=Haynes, R. R. and A. Lasseigne. 1969. Cyperus giganteus (Cyperaceae) in Florida. Sida 3: 345.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Cyperus giganteus
|authority=Vahl
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Cyperaceae
|phenology=Fruiting summer.
|habitat=Stream banks, marshes
|elevation=0–10 m
|distribution=La.;Tex.;Mexico;West Indies;Central America;South America.
|introduced=true
|reference=haynes1969a
|publication title=Enum. Pl.
|publication year=1805
|special status=Introduced;Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V23/V23_288.xml
|genus=Cyperus
|subgenus=Cyperus subg. Cyperus
|species=Cyperus giganteus
}}<!--

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