View source for Scirpus divaricatus

{{Treatment/ID
|accepted_name=Scirpus divaricatus
|accepted_authority=Elliott
|publications={{Treatment/Publication
|title=Sketch Bot. S. Carolina
|place=1: 88, plate 2, fig. 4. 1816
|year=1816
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Cyperaceae;Scirpus;Scirpus divaricatus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Scirpus]]</div><div class="higher-taxon"><small>species</small>[[Scirpus divaricatus]]</div></div>
|volume=Volume 23
|mention_page=page 10, 12
|treatment_page=page 11
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form;whole_organism growth form"><b>Plants </b>cespitose;</span> <span class="statement" id="st-d0_s1" data-properties="rhizome prominence">rhizomes not apparent.</span> <span class="statement" id="st-d0_s2" data-properties="culm reproduction;culm architecture or arrangement;culm orientation"><b>Culms:</b> fertile ones lax, reclining, inflorescences lopping over to (or nearly to) ground;</span> <span class="statement" id="st-d0_s3" data-properties="">nodes frequently with axillary bulblets.</span> <span class="statement" id="st-d0_s4" data-properties="leaf quantity"><b>Leaves </b>10–18 per culm;</span> <span class="statement" id="st-d0_s5" data-properties="proximal sheath coloration;proximal sheath coloration">proximal leaf-sheaths green or brownish;</span> <span class="statement" id="st-d0_s6" data-properties="proximal sheath prominence;proximal blade prominence;septum quantity">proximal sheaths and blades with septa few, inconspicuous;</span> <span class="statement" id="st-d0_s7" data-properties="blade length;blade width">blades 16–55 cm × 4–8 mm.</span> <span class="statement" id="st-d0_s8" data-properties="inflorescence position or structure subtype"><b>Inflorescences </b>terminal;</span> <span class="statement" id="st-d0_s9" data-properties="ray arrangement;proximal ray architecture or pubescence or relief;pedicel pubescence or relief;distal ray pubescence or relief">rays divergent, proximal rays smooth, pedicels and distal rays scabrous, rays often bearing axillary bulblets;</span> <span class="statement" id="st-d0_s10" data-properties="involucral-bract base coloration;involucral-bract base coloration;involucral-bract base coating">bases of involucral-bracts green or brownish, not glutinous.</span> <span class="statement" id="st-d0_s11" data-properties="cyme architecture;central spikelet architecture;other architecture;spikelet shape;spikelet length;spikelet width"><b>Spikelets </b>in open cymes, central spikelet of each cyme sessile, others long-pedicellate, spikelets cylindric to narrowly ovoid, 4–14 × 1–2 mm;</span> <span class="statement" id="st-d0_s12" data-properties="scale coloration;scale shape;scale shape;scale some measurement;midrib width;midrib coloration;apex shape;apex architecture or shape;apex shape;apiculu some measurement;mucro some measurement">scales light-brown to reddish with broad green midribs, broadly ovate or elliptic, 1.2–1.8 mm, apex rounded to obtuse, apiculate, or sometimes short-mucronate, apiculus or mucro (if present) to 0.1 mm.</span> <span class="statement" id="st-d0_s13" data-properties="perianth bristle duration;perianth bristle quantity;perianth bristle fragility or size;perianth bristle arrangement or shape;perianth bristle variability;perianth bristle length or size;perianth bristle orientation;tooth fragility;tooth architecture;tooth orientation"><b>Flowers:</b> perianth bristles persistent, 6, stout, contorted, equaling or longer than achene, not projecting beyond it, with delicate, round-tipped, retrorse teeth in distal 1/2, enclosed within scales;</span> <span class="statement" id="st-d0_s14" data-properties="style shape">styles 3-fid.</span> <span class="statement" id="st-d0_s15" data-properties="achene coloration;achene shape;achene shape;achene length;achene width;angle fragility;side shape;2n chromosome quantity"><b>Achenes </b>off-white to yellowish-brown, elliptic-obovate in outline, strongly trigonous with very strong angles and concave sides, 0.8–1 × 0.6–0.8 mm. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|phenology=Fruiting late spring–early summer (May–Jun).
|habitat=Lowland swamps along streams (often associated with Taxodium)
|elevation=0–100 m
|distribution=Ala.;Ark.;Fla.;Ga.;La.;Mo.;N.C.;S.C.;Tenn.;Tex.;Va.
|discussion=<p>The inflorescence of Scirpus divaricatus is very large and open. As in related species, the central spikelet of each cyme is sessile, and the others are long-pedicellate. The cymes often consist of only two spikelets in which the sessile, terminal spikelet may appear lateral.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Scirpus divaricatus
|authority=Elliott
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Cyperaceae
|phenology=Fruiting late spring–early summer (May–Jun).
|habitat=Lowland swamps along streams (often associated with Taxodium)
|elevation=0–100 m
|distribution=Ala.;Ark.;Fla.;Ga.;La.;Mo.;N.C.;S.C.;Tenn.;Tex.;Va.
|reference=None
|publication title=Sketch Bot. S. Carolina
|publication year=1816
|special status=Illustrated;Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V23/V23_3.xml
|genus=Scirpus
|species=Scirpus divaricatus
|2n chromosome quantity=28
|achene coloration=off-white;yellowish-brown
|achene length=0.8mm;1mm
|achene shape=trigonous;elliptic-obovate
|achene width=0.6mm;0.8mm
|angle fragility=strong
|apex architecture or shape=apiculate
|apex shape=short-mucronate;rounded;obtuse
|apiculu some measurement=0mm;0.1mm
|blade length=16cm;55cm
|blade width=4mm;8mm
|central spikelet architecture=sessile
|culm architecture or arrangement=lax
|culm orientation=reclining
|culm reproduction=fertile
|cyme architecture=open
|distal ray pubescence or relief=scabrous
|inflorescence position or structure subtype=terminal
|involucral-bract base coating=not glutinous
|involucral-bract base coloration=brownish;green
|leaf quantity=10;18
|midrib coloration=green
|midrib width=broad
|mucro some measurement=0mm;0.1mm
|other architecture=long-pedicellate
|pedicel pubescence or relief=scabrous
|perianth bristle arrangement or shape=contorted
|perianth bristle duration=persistent
|perianth bristle fragility or size=stout
|perianth bristle length or size=longer
|perianth bristle orientation=not projecting
|perianth bristle quantity=6
|perianth bristle variability=equaling
|proximal blade prominence=inconspicuous
|proximal ray architecture or pubescence or relief=smooth
|proximal sheath coloration=brownish;green
|proximal sheath prominence=inconspicuous
|ray arrangement=divergent
|rhizome prominence=not apparent
|scale coloration=light-brown;reddish
|scale shape=elliptic;ovate
|scale some measurement=1.2mm;1.8mm
|septum quantity=few
|side shape=concave
|spikelet length=4mm;14mm
|spikelet shape=cylindric;narrowly ovoid
|spikelet width=1mm;2mm
|style shape=3-fid
|tooth architecture=round-tipped
|tooth fragility=delicate
|tooth orientation=retrorse
|whole_organism growth form=plant;cespitose
}}<!--

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