View source for Rhynchospora oligantha

{{Treatment/ID
|accepted_name=Rhynchospora oligantha
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Ann. Lyceum Nat. Hist. New York
|place=3: 212. 1835
|year=1835
}}
|basionyms=
|synonyms=
|hierarchy=Cyperaceae;Rhynchospora;Rhynchospora oligantha
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Rhynchospora]]</div><div class="higher-taxon"><small>species</small>[[Rhynchospora oligantha]]</div></div>
|volume=Volume 23
|mention_page=page 201, 203, 217
|treatment_page=page 218
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, densely cespitose, knottybased, 20–40 cm; rhizomes absent. <b>Culms</b> filiform, leafy at base, wiry. <b>Leaves</b> ascending to erect; blades filiform, nearly terete, or channeled, sometimes compressed, nearly reaching distal inflorescence or much shorter, 0.2–0.3 mm thick, apex subulate. <b>Inflorescences</b>: spikelet clusters 2–6, simple or reduced to 1 spikelet, branches ascending to divaricate or reflexed; leafy bracts single per cluster, filiform, setaceous, with clusters appearing lateral to bracts. <b>Spikelets</b> pale redbrown, ellipsoidlanceoloid, 5–6(–8) mm, apex acute to acuminate; fertile scales oblongelliptic, convex, acuminate, 3.5–5 mm, apex broadly acute, midrib forming apiculus. <b>Flowers</b>: perianth bristles 6, reaching to or slightly past tubercle base, increasingly plumose from middle to base. <b>Fruits</b> 1–3 per spikelet, (2.5–)2.7–3(–3.4) mm; body light brown to brown, ellipsoidobovoid, distally conspicuously necked, tumidly lenticular, 1.7–2.5 × 1.5–1.8 mm; surfaces smooth or minutely transversely rugulose; tubercle conicsubulate, 0.5–0.7 mm, base flaring.</span><!--

-->{{Treatment/Body
|phenology=Fruiting spring–summer.
|habitat=Sands and peats of bogs, depressions in savannas, open pinelands, seeps
|elevation=0–200 m
|distribution=Ala.;Del.;D.C.;Fla.;Ga.;La.;Miss.;N.J.;N.C.;S.C.;Tex.;Va.;West Indies;Central America.
|discussion=<p><i>Rhynchospora oligantha</i> is distinguished from other taxa of its complex mostly by the distinctive neck at the achene apex, a feature essentially absent in <i>R. breviseta</i>, its closest relative. Those two species have been heavily impacted by conversion of pine savannas to cropland or pine plantations; even with abandonment or clearing of such land, they are very slow to reoccupy the disturbed sites.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Rhynchospora oligantha
|authority=A. Gray
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Cyperaceae
|phenology=Fruiting spring–summer.
|habitat=Sands and peats of bogs, depressions in savannas, open pinelands, seeps
|elevation=0–200 m
|distribution=Ala.;Del.;D.C.;Fla.;Ga.;La.;Miss.;N.J.;N.C.;S.C.;Tex.;Va.;West Indies;Central America.
|reference=None
|publication title=Ann. Lyceum Nat. Hist. New York
|publication year=1835
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_377.xml
|genus=Rhynchospora
|species=Rhynchospora oligantha
}}<!--

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