View source for Packera plattensis

{{Treatment/ID
|accepted_name=Packera plattensis
|accepted_authority=(Nuttall) W. A. Weber & Á. Löve
|publications={{Treatment/Publication
|title=Phytologia
|place=49: 48. 1981
|year=1981
}}
|common_names=Prairie groundsel
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Senecio plattensis
|authority=Nuttall
|rank=species
|publication_title=Trans. Amer. Philos. Soc., n. s.
|publication_place=7: 413. 1841
}}
|synonyms={{Treatment/ID/Synonym
|name=Senecio pseudotomentosus
|authority=Mackenzie & Bush
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera plattensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Senecioneae]]</div><div class="higher-taxon"><small>genus</small>[[Packera]]</div><div class="higher-taxon"><small>species</small>[[Packera plattensis]]</div></div>
|volume=Volume 20
|mention_page=page 574, 577, 578, 589
|treatment_page=page 596
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Biennials </b>or perennials, 20–60+ cm; rhizomatous and/or fibrous-rooted (bases erect to suberect), sometimes stoloniferous (mostly eastern populations). <b>Stems</b> 1 or 2–3, clustered, floccose-tomentose proximally and in leaf axils, otherwise sparsely tomentose or glabrescent. <b>Basal</b> leaves (and proximal cauline) petiolate; blades narrowly elliptic to elliptic-ovate or oblanceolate to suborbiculate or sublyrate, 20–70+ × 10–30+ mm, bases tapering to rounded or abruptly contracted, margins subentire to crenate, serrate-dentate, or pinnately lobed (abaxial faces floccose-tomentose, especially along midribs, ± glabrescent). <b>Cauline</b> leaves gradually reduced (petiolate, sublyrate or pinnatisect, abaxial faces sparsely hairy; distals sessile, subentire to irregularly dissected). <b>Heads</b> 6–20+ in open or congested, corymbiform arrays. <b>Peduncles</b> conspicuously bracteate, sparsely to densely tomentose. <b>Calyculi</b> inconspicuous. <b>Phyllaries</b> 13 or 21, green (tips sometimes cyanic), 5–6+ mm, densely tomentose proximally, glabrescent distally. <b>Ray</b> florets 8–10; corolla laminae 9–10 mm. <b>Disc</b> florets 60–70+; corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm. <b>Cypselae</b> 1.5–2.5 mm, usually hirtellous, sometimes glabrous; pappi 6.5–7.5 mm. <b>2n</b> = 46, 92.</span><!--

-->{{Treatment/Body
|phenology=Flowering mid Apr–early Jun(–mid Jul, north).
|habitat=Prairies, meadows, open wooded areas, along highways, railroads, around mining and construction areas, usually on limestone
|elevation=50–1800 m
|distribution=Ont.;Sask.;Ark.;Colo.;Ga.;Ill.;Ind.;Iowa;Kans.;La.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;N.Mex.;N.Dak.;Ohio;Okla.;Pa.;S.Dak.;Tenn.;Va.;Wis.;Wyo.
|discussion=<p><i>Packera plattensis</i> is abundant, widespread, and almost weedy. Putative hybrids with other species are known. Plants in mesic, remnant prairies in the east are sometimes stoloniferous.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Packera plattensis
|authority=(Nuttall) W. A. Weber & Á. Löve
|rank=species
|parent rank=genus
|synonyms=Senecio pseudotomentosus
|basionyms=Senecio plattensis
|family=Asteraceae
|phenology=Flowering mid Apr–early Jun(–mid Jul, north).
|habitat=Prairies, meadows, open wooded areas, along highways, railroads, around mining and construction areas, usually on limestone
|elevation=50–1800 m
|distribution=Ont.;Sask.;Ark.;Colo.;Ga.;Ill.;Ind.;Iowa;Kans.;La.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;N.Mex.;N.Dak.;Ohio;Okla.;Pa.;S.Dak.;Tenn.;Va.;Wis.;Wyo.
|reference=None
|publication title=Phytologia
|publication year=1981
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1333.xml
|tribe=Asteraceae tribe Senecioneae
|genus=Packera
|species=Packera plattensis
}}<!--

-->[[Category:Treatment]][[Category:Packera]]