View source for Flaveria trinervia

{{Treatment/ID
|accepted_name=Flaveria trinervia
|accepted_authority=(Sprengel) C. Mohr
|publications={{Treatment/Publication
|title=Contr. U.S. Natl. Herb.
|place=6: 810. 1901
|year=1901
}}
|common_names=Clustered yellowtops
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Odera trinervia
|authority=Sprengel
|rank=species
|publication_title=Bot. Gart. Halle,
|publication_place=63. 1800
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Flaveriinae;Flaveria;Flaveria trinervia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Flaveriinae]]</div><div class="higher-taxon"><small>genus</small>[[Flaveria]]</div><div class="higher-taxon"><small>species</small>[[Flaveria trinervia]]</div></div>
|volume=Volume 21
|mention_page=page 247
|treatment_page=page 250
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration"><b>Annuals,</b> to 200+ cm (delicate or robust, glabrate or glabrous).</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation"><b>Stems </b>erect.</span> <span class="statement" id="st-d0_s2" data-properties="leaf architecture;leaf architecture"><b>Leaves </b>petiolate (proximal, petioles 10–20 mm) or sessile (distal);</span> <span class="statement" id="st-d0_s3" data-properties="blade shape;blade length;blade atypical width;blade width;base fusion;margin architecture or shape;margin architecture or shape;margin architecture or shape">blades lanceolate or oblanceolate to elliptic or subovate, 30–150 × (7–) 10–40 mm, bases (distal) connate, margins serrate, serrate-dentate, or spinulose-serrate.</span> <span class="statement" id="st-d0_s4" data-properties="head quantity;glomerule arrangement or density;glomerule position;glomerule architecture"><b>Heads </b>30–300+, in tight, axillary, sessile glomerules (receptacles of glomerules setose).</span> <span class="statement" id="st-d0_s5" data-properties="calyculus presence"><b>Calyculi </b>0.</span> <span class="statement" id="st-d0_s6" data-properties="involucre shape;involucre shape;involucre shape;involucre some measurement"><b>Involucres </b>oblong and cylindric or angular, 3.8–4.5 mm.</span> <span class="statement" id="st-d0_s7" data-properties="phyllary quantity;phyllary shape"><b>Phyllaries </b>usually 2, oblong (closely investing and falling with mature cypselae).</span> <span class="statement" id="st-d0_s8" data-properties="ray-floret quantity"><b>Ray-</b>florets 0–1;</span> <span class="statement" id="st-d0_s9" data-properties="lamina coloration;lamina coloration;lamina shape;lamina shape;lamina some measurement">laminae pale-yellow or whitish, oblique or suborbiculate, 0.5–1 mm.</span> <span class="statement" id="st-d0_s10" data-properties="disc-floret atypical quantity;disc-floret quantity"><b>Disc-</b>florets 0–1 (–2);</span> <span class="statement" id="st-d0_s11" data-properties="corolla-tube distance;throat shape;throat some measurement">corolla-tubes 0.5–1.4 mm, throats campanulate, 0.5–0.8 mm.</span> <span class="statement" id="st-d0_s12" data-properties="cypsela shape;cypsela some measurement"><b>Cypselae </b>oblanceoloid to subclavate, 2–2.6 mm (rays longer);</span> <span class="statement" id="st-d0_s13" data-properties="pappus presence;2n chromosome quantity">pappi 0.2n = 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Dec.
|habitat=Near water, saline and gypseous areas
|elevation=0–1900 m
|distribution=Ariz.;Calif.;Fla.;Mass.;Mo.;N.Mex.;Tex.;Va.;West Indies;Central America (British Honduras);South America (Brazil);South America (Ecuador);South America (Peru);South America (Venezuela);probably  in Asia (India);probably  in Asia (Middle East);Africa;Pacific Islands (Hawaii)
|discussion=<p>Flaveria trinervia is widespread and weedy; it often occurs in saline, gypseous, disturbed areas near permanent or ephemeral water sources in southern Florida and from Texas to southern California. It occurs also in scattered locations in some eastern states and has been reported from Alabama.</p><!--
--><p>The heads of Flaveria trinervia, which usually contain just one floret, are either radiate or discoid; radiate heads tend to occur on the periphery of setose glomerules. Reduction of some of the floral features, including number of florets [0–1(–2)], phyllaries per head (2), and size of ray laminae, suggest that F. trinervia may be the most derived species in the genus.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Flaveria trinervia
|authority=(Sprengel) C. Mohr
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Odera trinervia
|family=Asteraceae
|phenology=Flowering Mar–Dec.
|habitat=Near water, saline and gypseous areas
|elevation=0–1900 m
|distribution=Ariz.;Calif.;Fla.;Mass.;Mo.;N.Mex.;Tex.;Va.;West Indies;Central America (British Honduras);South America (Brazil);South America (Ecuador);South America (Peru);South America (Venezuela);probably  in Asia (India);probably  in Asia (Middle East);Africa;Pacific Islands (Hawaii)
|reference=None
|publication title=Contr. U.S. Natl. Herb.
|publication year=1901
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_619.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Flaveriinae
|genus=Flaveria
|species=Flaveria trinervia
|2n chromosome quantity=36
|base fusion=connate
|blade atypical width=7mm;10mm
|blade length=30mm;150mm
|blade shape=oblanceolate;elliptic or subovate
|blade width=10mm;40mm
|calyculus presence=absent
|corolla-tube distance=0.5mm;1.4mm
|cypsela shape=oblanceoloid;subclavate
|cypsela some measurement=2mm;2.6mm
|disc-floret atypical quantity=1;2
|disc-floret quantity=0;1
|glomerule architecture=sessile
|glomerule arrangement or density=tight
|glomerule position=axillary
|head quantity=30;300
|involucre shape=angular;cylindric;oblong
|involucre some measurement=3.8mm;4.5mm
|lamina coloration=whitish;pale-yellow
|lamina shape=suborbiculate;oblique
|lamina some measurement=0.5mm;1mm
|leaf architecture=sessile;petiolate
|margin architecture or shape=spinulose-serrate;serrate-dentate;serrate
|pappus presence=absent
|phyllary quantity=2
|phyllary shape=oblong
|ray-floret quantity=0;1
|stem orientation=erect
|throat shape=campanulate
|throat some measurement=0.5mm;0.8mm
|whole-organism duration=annual
|whole-organism some measurement=0cm;200cm
}}<!--

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