View source for Rhynchospora perplexa

{{Treatment/ID
|accepted_name=Rhynchospora perplexa
|accepted_authority=Britton in J. K. Small
|publications={{Treatment/Publication
|title=in J. K. Small, Fl. S.E. U.S.,
|place=197, 1328. 1903
|year=1903
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Phaeocephalum perplexum
|authority=(Britton) House
}}
|hierarchy=Cyperaceae;Rhynchospora;Rhynchospora perplexa
|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 perplexa]]</div></div>
|volume=Volume 23
|mention_page=page 205, 228, 230
|treatment_page=page 229
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, cespitose, 50–110 cm; rhizomes absent. <b>Culms</b> lax, often excurved, slender, ± terete or trigonous. <b>Leaves</b> ascending, exceeded by culm; blades linear, proximally flat, 1.5–2.5 mm wide, apex trigonous, subulate, tapering. <b>Inflorescences</b>: clusters 3–4, widely spaced, narrowly, compactly, or diffusely turbinate; leafy bracts exceeding proximal clusters. <b>Spikelets</b> deep redbrown, ovoid to broadly ellipsoid, 2–3 mm, apex acute to acuminate; fertile scales broadly elliptic to obovate or orbiculate, 1.4–2(–2.5) mm, apex rounded to notched, midrib shortexcurrent. <b>Flowers</b>: perianth bristles 0–3, vestigial when present. <b>Fruits</b> 2–4 per spikelet, 1.5 mm; body pale brown to brown, strongly flattened, orbicular to broadly obovoid, 1–1.3 × 0.9–1.2 mm, surfaces sharply transversely wavyrugose, intervals finely vertically striate with rows of linearrectangular alveolae; tubercle depressed, triangular, flattened, 0.2–0.3 mm, base lunate.</span><!--

-->{{Treatment/Body
|phenology=Fruiting late spring–fall or all year (south).
|habitat=Sands and peats of pond and lakeshores, depressions in savannas and flatwoods, or seeps
|elevation=0–400 m
|distribution=Ala.;Fla.;Ga.;La.;Miss.;N.C.;S.C.;Tenn.;Tex.;Va.;West Indies (Cuba;Dominican Republic);Central America.
|discussion=<p>In habit and in shape, size, and color of spikelet, <i>Rhynchospora perplexa</i> strongly resembles <i>R. microcarpa</i>, a species with which it is commonly associated in the Coastal Plain. An examination of the fruit shows those of <i>R. perplexa</i> to be flattened, with fewer and much coarser transverse ridges, the intervals with very narrow vertical alveolae. The perianth in most instances is absent or rudimentary. Fruit of <i>R. microcarpa</i> is biconvex with more transverse ridges (eight or more), the intervals more coarsely alveolate; its perianth bristles are six, evident, extending at least halfway up the fruit body.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Rhynchospora perplexa
|author=
|authority=Britton in J. K. Small
|rank=species
|parent rank=genus
|synonyms=Phaeocephalum perplexum
|basionyms=
|family=Cyperaceae
|phenology=Fruiting late spring–fall or all year (south).
|habitat=Sands and peats of pond and lakeshores, depressions in savannas and flatwoods, or seeps
|elevation=0–400 m
|distribution=Ala.;Fla.;Ga.;La.;Miss.;N.C.;S.C.;Tenn.;Tex.;Va.;West Indies (Cuba;Dominican Republic);Central America.
|reference=None
|publication title=in J. K. Small, Fl. S.E. U.S.,
|publication year=1903
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V23/V23_405.xml
|genus=Rhynchospora
|species=Rhynchospora perplexa
}}<!--

-->[[Category:Treatment]][[Category:Rhynchospora]]