View source for Poteridium occidentale

{{Treatment/ID
|accepted_name=Poteridium occidentale
|accepted_authority=(Nuttall) Rydberg
|publications={{Treatment/Publication
|title=in N. L. Britton et al., N. Amer. Fl.
|place=22: 388. 1908
|year=1908
}}
|common_names=Western burnet
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Sanguisorba occidentalis
|authority=Nuttall
|rank=species
|publication_title=in J. Torrey and A. Gray, Fl. N. Amer.
|publication_place=1: 429. 1840
}}
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Agrimonieae;Poteridium;Poteridium occidentale
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Rosoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Agrimonieae]]</div><div class="higher-taxon"><small>genus</small>[[Poteridium]]</div><div class="higher-taxon"><small>species</small>[[Poteridium occidentale]]</div></div>
|volume=Volume 9
|mention_page=
|treatment_page=page 320
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>winter-annual, glabrous; taproots 3–10 dm. <b>Stamens</b> 2(or 4). <b>Fruits</b>: hypanthia ridges rounded, thickened; sepals not thickened proximally.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Jul; fruiting Jun–Aug.
|habitat=Prairies, sandy open ground, sagebrush flats, vernal pools, drawdown shorelines of streams and lakes, grassy clearings, roadsides, particularly with surficial or subterranean moisture
|elevation=10–2100 m
|distribution=B.C.;Ariz.;Calif.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Wash.;Wyo.
|discussion=<p>The taxonomic status of <i>Poteridium occidentale</i> has been controversial. Most floristicians of the twentieth century accepted it as distinct from the more eastern <i>P. annuum</i> (usually treating the two in <i>Sanguisorba</i>); but in recent decades a trend developed to merge the two taxa. While superficially similar, they seem to represent independent evolutionary lineages, as indicated by morphologic distinctions and allopatric distributions.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Poteridium occidentale
|authority=(Nuttall) Rydberg
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Sanguisorba occidentalis
|family=Rosaceae
|phenology=Flowering May–Jul; fruiting Jun–Aug.
|habitat=Prairies, sandy open ground, sagebrush flats, vernal pools, drawdown shorelines of streams and lakes, grassy clearings, roadsides, particularly with surficial or subterranean moisture
|elevation=10–2100 m
|distribution=B.C.;Ariz.;Calif.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Wash.;Wyo.
|reference=None
|publication title=in N. L. Britton et al., N. Amer. Fl.
|publication year=1908
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_522.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Agrimonieae
|genus=Poteridium
|species=Poteridium occidentale
}}<!--

-->[[Category:Treatment]][[Category:Poteridium]]