View source for Cirsium horridulum var. megacanthum

{{Treatment/ID
|accepted_name=Cirsium horridulum var. megacanthum
|accepted_authority=(Nuttall) D. J. Keil
|publications={{Treatment/Publication
|title=Sida
|place=21: 214. 2004
|year=2004
}}
|common_names=Bigspine thistle
|basionyms={{Treatment/ID/Basionym
|name=Cirsium megacanthum
|authority=Nuttall
|rank=species
|publication_title=Trans. Amer. Philos. Soc., n. s.
|publication_place=7: 421. 1841 (as Circium)
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium horridulum;Cirsium horridulum var. megacanthum
|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 horridulum]]</div><div class="higher-taxon"><small>variety</small>[[Cirsium horridulum var. megacanthum]]</div></div>
|volume=Volume 19
|mention_page=page 114
|treatment_page=page 115
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>100–250 cm. <b>Stems</b> glabrous to sparsely tomentose. <b>Leaves</b>: blades oblanceolate or oblong-elliptic, 20–40 cm, shallowly to deeply pinnatifid, main spines 10–30 mm, abaxial faces glabrous or nearly so. <b>Heads</b> 10–20. <b>Involucres</b> 4–5 × 5–8 cm, glabrous. <b>Phyllaries</b>: outer and middle bodies scabridulous or minutely spinulose, marginal spinules usually 1 mm or shorter. <b>Corollas</b> pink to purple. <b>2n</b> = 32, 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring (Mar–Jun).
|habitat=Meadows, pastures, roadsides, forest openings, low ground, often in damp soil
|elevation=0–100 m
|distribution=Ala.;Ark.;Fla.;La.;Miss.;Okla.;Tex.
|discussion=<p>Variety megacanthum occurs on the coastal plain and lower piedmont from northern Florida to eastern Texas and southeastern Oklahoma. Nuttall described this thistle as “one of the most terribly armed plants in the genus.”</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Cirsium horridulum var. megacanthum
|authority=(Nuttall) D. J. Keil
|rank=variety
|parent rank=species
|synonyms=
|basionyms=Cirsium megacanthum
|family=Asteraceae
|phenology=Flowering spring (Mar–Jun).
|habitat=Meadows, pastures, roadsides, forest openings, low ground, often in damp soil
|elevation=0–100 m
|distribution=Ala.;Ark.;Fla.;La.;Miss.;Okla.;Tex.
|reference=None
|publication title=Sida
|publication year=2004
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V19_64.xml
|tribe=Asteraceae tribe Cardueae
|genus=Cirsium
|species=Cirsium horridulum
|variety=Cirsium horridulum var. megacanthum
}}<!--

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