View source for Arctium tomentosum

{{Treatment/ID
|accepted_name=Arctium tomentosum
|accepted_authority=Miller
|publications={{Treatment/Publication
|title=Gard. Dict. ed.
|place=8, Arctium no. 3. 1768
|year=1768
}}
|common_names=Woolly burdock;bardane tomenteuse
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Arctium;Arctium tomentosum
|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>[[Arctium]]</div><div class="higher-taxon"><small>species</small>[[Arctium tomentosum]]</div></div>
|volume=Volume 19
|mention_page=page 170
|treatment_page=page 169
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>to 250 cm. <b>Basal</b> leaves: petioles hollow or solid, 10–15 cm, glandular-hairy; blades 30–40 × 16–28 cm, coarsely dentate to subentire, abaxially white-tomentose, adaxially green, sparsely short-hairy. <b>Heads</b> usually in corymbiform clusters, long-pedunculate. <b>Peduncles</b> 1.5–12 cm. <b>Involucres</b> 15–25 mm diam., densely cobwebby (rarely glabrate). <b>Phyllaries</b> linear to linear-lanceolate, inner usually purplish, margins with minute spreading or reflexed glandular hairs. <b>Florets</b> 30+; corollas rose-purple, (occasionally white), 9–13 mm, limb minutely glandular. <b>Cypselae</b> light brown, 5–8 mm; pappus bristles 1–3 mm. <b>2n</b> = 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer–early fall (Jul–Oct).
|habitat=Waste places, roadsides, fields, forest clearings
|elevation=0–1600 m
|distribution=Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Colo.;Conn.;Maine;Mass.;Minn.;Mo.;N.H.;N.Dak.;Ohio;S.Dak.;Vt.;Eurasia.
|introduced=true
|discussion=<p><i>Arctium tomentosum</i> has been reported from Illinois, Iowa, Maryland, New Jersey, Oregon, Pennsylvania, South Carolina, and Wisconsin; I have not seen specimens.The involucres of <i>Arctium tomentosum</i> are usually very densely cobwebby.</p><!--
--><p>Exceptional forms of <i>A. tomentosum</i> have nearly glabrous involucres. Forms of <i>A. minus</i> with especially cobwebby involucres have been misidentified as <i>A. tomentosum</i>; they lack the corymbiform capitulescence and glandular corollas of the latter.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Arctium tomentosum
|authority=Miller
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering summer–early fall (Jul–Oct).
|habitat=Waste places, roadsides, fields, forest clearings
|elevation=0–1600 m
|distribution=Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Colo.;Conn.;Maine;Mass.;Minn.;Mo.;N.H.;N.Dak.;Ohio;S.Dak.;Vt.;Eurasia.
|introduced=true
|reference=None
|publication title=Gard. Dict. ed.
|publication year=1768
|special status=Introduced
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V19_185.xml
|tribe=Asteraceae tribe Cardueae
|genus=Arctium
|species=Arctium tomentosum
}}<!--

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