View source for Cyperus fugax

{{Treatment/ID
|accepted_name=Cyperus fugax
|accepted_authority=Liebmann
|publications={{Treatment/Publication
|title=Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser.
|place=5, 2: 196. 1850
|year=1850
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Cyperus tenellus
|authority=J. Presl & C. Presl
|rank=species
|publication_title=
|publication_place=1828
}}
|synonyms={{Treatment/ID/Synonym
|name=Cyperus inconspicuus
|authority=Liebmann
|rank=species
}}
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Pycreus;Cyperus fugax
|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. Pycreus]]</div><div class="higher-taxon"><small>species</small>[[Cyperus fugax]]</div></div>
|volume=Volume 23
|mention_page=page 142, 160
|treatment_page=page 159
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, cespitose. <b>Culms</b> (1–)10–30(–60) together, roundly trigonous proximally, trigonous distally, (0.5–)3–6(–12) cm × (0.2–)0.4–0.8 mm, glabrous. <b>Leaves</b> V-shaped, (1–)3–5(–10) cm × (0.5–)1–2 mm. <b>Inflorescences</b>: spikes loosely ovoid, 8–15(–25) mm wide; rachis 1–3 mm; rays (1–)2–4(–6), (0.5–)1–3(–6) cm; 2d order rays absent; bracts (1–)2–4(–5), ascending at 30–45°, V-shaped, (1–)2.5–6(–11) cm × 0.5–1.8 mm. <b>Spikelets</b> (2–)4–6(–10), linear-lanceoloid, strongly flattened, (5–)8–12(–18) × 1.2–1.5 (1.8) mm; floral scales (5–)10–16(–32), laterally clear, stramineous or light reddish brown, medially green, laterally ribless, medially 3(–5)-ribbed, ovate, (1.2–)1.3–1.6(–2) × 1–1.2(–1.4) mm, apex obtuse, mucronate to minutely mucronulate. <b>Flowers</b>: stamens 2; anthers 0.1–0.2 mm; styles 0.1–0.3(–0.4) mm; stigmas 0.3–0.4 mm. <b>Achenes</b> light to dark brown, glossy or iridescent, stipitate, oblong-obovoid, 0.9–1.1 × 0.4–0.5 mm, stipe 0.1 mm, apex truncate, apiculate, surfaces punctate.</span><!--

-->{{Treatment/Body
|phenology=Fruiting early summer.
|habitat=Wet, disturbed sandy soils in full sun
|elevation=0–200 m
|distribution=La.;Tex.;West Indies (Cuba);Central America;South America (Ecuador).
|discussion=<p><i>Cyperus fugax</i> is known from Louisiana from an early nineteeth century collection from “western Louisiana” (Hale s.n., TCD).</p><!--
--><p><i>Cyperus fugax</i> has been treated as a form of <i>C. polystachyos</i> (G. Kükenthal 1935–1936; A. B. Ayers 1946); nevertheless, specific status is appropriate. The most conspicuous differences are the annual habit and small size (less than 12 cm) of <i>C. fugax</i>; <i>C. polystachyos</i> is a perennial of moderate size (mostly taller than 20 cm). Other differences are summarized below.</p><!--
--><p><i>Cyperus polystachyos</i> is characterized as a shortly rhizomatous perennial; floral scales oblong, 1.8–2.4 mm, closely imbricate; styles 0.6–1 mm; stigmas 1.4–2 mm; anthers 0.6–0.8 mm; achenes substipitate to cuneate, slightly compressed laterally.</p><!--
--><p><i>Cyperus fugax</i> is characterized as a nonrhizomatous annual; floral scales ovate, 1.3–1.6 mm, loosely imbricate; styles 0.1–0.2 mm; stigmas 0.3–0.4 mm; filaments 1.2–1.4 mm; anthers 0.1–0.2 mm; achenes stipitate, strongly compressed laterally.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Cyperus fugax
|authority=Liebmann
|rank=species
|parent rank=subgenus
|synonyms=Cyperus inconspicuus
|basionyms=Cyperus tenellus
|family=Cyperaceae
|phenology=Fruiting early summer.
|habitat=Wet, disturbed sandy soils in full sun
|elevation=0–200 m
|distribution=La.;Tex.;West Indies (Cuba);Central America;South America (Ecuador).
|reference=None
|publication title=Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser.
|publication year=1850
|special status=Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_251.xml
|genus=Cyperus
|subgenus=Cyperus subg. Pycreus
|species=Cyperus fugax
}}<!--

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