View source for Isolepis cernua

{{Treatment/ID
|accepted_name=Isolepis cernua
|accepted_authority=(Vahl) Roemer & Schultes in J. J. Roemer et al.
|publications={{Treatment/Publication
|title=in J. J. Roemer et al., Syst. Veg.
|place=2: 106. 1817
|year=1817
}}
|basionyms={{Treatment/ID/Synonym
|name=Scirpus cernuus
|authority=Vahl
}}
|synonyms={{Treatment/ID/Synonym
|name=Scirpus cernuus var. californicus
|authority=(Torrey) Beetle
}}{{Treatment/ID/Synonym
|name=Scirpus cernuus subsp. californicus
|authority=(Torrey) Thorne
}}
|hierarchy=Cyperaceae;Isolepis;Isolepis cernua
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Isolepis]]</div><div class="higher-taxon"><small>species</small>[[Isolepis cernua]]</div></div>
|volume=Volume 23
|mention_page=page 138
|treatment_page=page 139
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual (or perennial?); rhizomes usually obscured by culm bases and very short, sometimes vertical and elongated. <b>Culms</b> 4–40 cm × 0.2–0.5 mm. <b>Leaves</b> sometimes sparsely orange-punctate at 10–15X; sheaths usually reddish proximally; distal blade rudimentary to much longer than sheath, often exceeding culm, to 20 cm × 0.2–1 mm. <b>Inflorescences</b>: involucral bract 1, sometimes subtending flower or resembling enlarged floral scale, 2–6(–23) mm. <b>Spikelets</b> 2–5 × 1–2 mm; scales partly or completely dark orange to red-brown, rarely stramineous, midrib greenish to stramineous, not gibbous, obscurely to prominently 3–11-veined, midrib keeled near apex, membranous, hyaline, apex rounded to acute, with mucro less than 0.1 mm; proximal scale to 2 mm; other scales 1.2–1.8 × 1–1.3 mm. <b>Flowers</b>: anthers 0.3–0.6 mm; styles 3-fid or 3-fid and 2-fid. <b>Achenes</b> falling separately from scales, medium to dark brown or stramineous, ellipsoid to obovoid, compressed-trigonous to thickly biconvex, lateral angles usually prominent, abaxial angle prominent to obscure, faces convex or adaxial face slightly concave, 0.8–1 × 0.5–0.7 mm, distinctly papillose at 10–15X to obscurely papillose at 40X, often with thin whitish surface layer. <b>2n</b> = 30.</span><!--

-->{{Treatment/Body
|phenology=Fruiting late spring–winter (Pacific Coast), winter–spring (Texas).
|habitat=Wet, freshwater to brackish places on beaches, dunes, marine bluffs, sandy areas, mostly coastal
|elevation=0–800 m
|distribution=B.C.;Calif.;Oreg.;Tex.;Wash.;Mexico (Baja California);temperate South America;Eurasia;Africa;Australia;New Zealand.
|discussion=<p>Isolepis cernua is widespread and variable. Four varieties were recognized by A. M. Muasya and D. M. Simpson (2002). Only var. ceruna is known from North America. The earliest collection I have seen from the Pacific Coast is from 1888; the earliest collection I have seen from Texas is from 1974.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Isolepis cernua
|author=
|authority=(Vahl) Roemer & Schultes in J. J. Roemer et al.
|rank=species
|parent rank=genus
|synonyms=Scirpus cernuus var. californicus;Scirpus cernuus subsp. californicus
|basionyms=Scirpus cernuus
|family=Cyperaceae
|phenology=Fruiting late spring–winter (Pacific Coast), winter–spring (Texas).
|habitat=Wet, freshwater to brackish places on beaches, dunes, marine bluffs, sandy areas, mostly coastal
|elevation=0–800 m
|distribution=B.C.;Calif.;Oreg.;Tex.;Wash.;Mexico (Baja California);temperate South America;Eurasia;Africa;Australia;New Zealand.
|reference=None
|publication title=in J. J. Roemer et al., Syst. Veg.
|publication year=1817
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V23/V23_221.xml
|genus=Isolepis
|species=Isolepis cernua
}}<!--

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