View source for Cirsium pumilum var. hillii

{{Treatment/ID
|accepted_name=Cirsium pumilum var. hillii
|accepted_authority=(Canby) B. Boivin
|publications={{Treatment/Publication
|title=Naturaliste Canad.
|place=94: 646. 1972
|year=1972
}}
|common_names=Hill’s thistle
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Cnicus hillii
|authority=Canby
|rank=species
|publication_title=Gard. &amp; Forest
|publication_place=4: 101. 1891
}}
|synonyms={{Treatment/ID/Synonym
|name=Cirsium hillii
|authority=(Canby) Fernald
|rank=species
}} {{Treatment/ID/Synonym
|name=Cirsium pumilum subsp. hillii
|authority=(Canby) R. J. Moore & Frankton
|rank=subspecies
}}
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium pumilum;Cirsium pumilum var. hillii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cardueae]]</div><div class="higher-taxon"><small>genus</small>[[Cirsium]]</div><div class="higher-taxon"><small>species</small>[[Cirsium pumilum]]</div><div class="higher-taxon"><small>variety</small>[[Cirsium pumilum var. hillii]]</div></div>
|volume=Volume 19
|mention_page=page 116
|treatment_page=page 117
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>mostly 25–60 cm, branches 0–4, short. <b>Roots</b> often tuberous-thickened. <b>Leaves</b> usually shallowly lobed, main spines ± fine, 3–6 mm. <b>Heads</b> 5–7 cm. <b>Phyllaries</b>: outer 3–6 mm wide at base, spines slender, 1.5–3 mm. <b>Corollas</b> usually 45–55 mm. <b>Cypselae</b> usually 4.5–5 mm. <b>2n</b> = 30.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jun–Aug).
|habitat=Sandy or gravelly soils, prairies, limestone barrens, pastures, pine barrens, open woods, and oak savannas
|elevation=200–400 m
|distribution=Ont.;Ill.;Ind.;Iowa;Mich.;Minn.;Wis.
|discussion=<p>Variety hillii occurs mainly in prairie areas from Minnesota and Iowa east to southern Ontario, Michigan, and northern Indiana. It has often been treated as a species distinct from <i>Cirsium pumilum</i>. As R. J. Moore and C. Frankton (1966) pointed out, the differences separating these taxa are, for the most part, metric characters that show considerable overlap. Some specimens, especially those from Ohio and western Pennsylvania, are difficult to place, and scattered individuals within the area of <i></i>var.<i> pumilum</i> would readily be assigned to <i></i>var.<i> hillii</i> were they growing in the area of that taxon. Moore and Frankton chose to recognize the infraspecific taxa within <i>C. pumilum</i> as subspecies, a rank that is seldom employed in North American <i>Cirsium</i> taxonomy.</p><!--
--><p>Hill’s thistle is a taxon that has attracted the attention of conservationists because of declining populations. Although the U.S. Fish and Wildlife Service determined in 1999 that this plant does not warrant elevation to Candidate Species status, it is recognized as a species of concern in several states. Throughout much of its range the populations have declined due to habitat destruction and fragmentation that have accompanied agricultural development and urbanization.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Cirsium pumilum var. hillii
|authority=(Canby) B. Boivin
|rank=variety
|parent rank=species
|synonyms=Cirsium hillii;Cirsium pumilum subsp. hillii
|basionyms=Cnicus hillii
|family=Asteraceae
|phenology=Flowering summer (Jun–Aug).
|habitat=Sandy or gravelly soils, prairies, limestone barrens, pastures, pine barrens, open woods, and oak savannas
|elevation=200–400 m
|distribution=Ont.;Ill.;Ind.;Iowa;Mich.;Minn.;Wis.
|reference=None
|publication title=Naturaliste Canad.
|publication year=1972
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_68.xml
|tribe=Asteraceae tribe Cardueae
|genus=Cirsium
|species=Cirsium pumilum
|variety=Cirsium pumilum var. hillii
}}<!--

-->[[Category:Treatment]][[Category:Cirsium pumilum]]