View source for Cerastium arvense

{{Treatment/ID
|accepted_name=Cerastium arvense
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=1: 438. 1753
|year=1753
}}
|common_names=Field or prairie mouse-ear chickweed;céraiste des champs
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms=
|hierarchy=Caryophyllaceae;Caryophyllaceae subfam. Alsinoideae;Cerastium;Cerastium arvense
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Caryophyllaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Caryophyllaceae subfam. Alsinoideae]]</div><div class="higher-taxon"><small>genus</small>[[Cerastium]]</div><div class="higher-taxon"><small>species</small>[[Cerastium arvense]]</div></div>
|volume=Volume 5
|mention_page=page 74, 76, 80, 91, 92
|treatment_page=page 79
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, clumped and taprooted, or mat-forming and long-creeping rhizomatous. <b>Stems</b>: flowering shoots often decumbent proximally, 5–20(–30) cm, glandular-pubescent distally, pilose-subglabrous, deflexed or spreading proximally; non-flowering shoots present; small tufts of leaves present in axils of proximal leaves. <b>Leaves</b> not marcescent, sessile, ± spatulate proximally; blade linear-lanceolate to lanceolate or narrowly oblong, 4–30 × 0.5–6 mm, apex acute, rarely obtuse, subglabrous to softly pubescent, sometimes glandular. <b>Inflorescences</b> lax, 1–20-flowered cymes, pubescence short, glandular; bracts lanceolate, margins narrow, scarious, glandular-pubescent. <b>Pedicels</b> curved just below calyx, 5–30 mm, 1–6 times as long as sepals, glandular-pubescent. <b>Flowers</b>: sepals narrowly lanceolate to lance-elliptic, 3.5–7 mm, margins narrow, softly pubescent; petals obovate, 7.5–12.5 mm, ca. 2 times as long as sepals, apex 2-fid; stamens 10; anthers 0.8–1.1 mm; styles 5. <b>Capsules</b> cylindric, curved, 7.5–11.5 × 2.5–4 mm, (1–)1.5–2 times as long as sepals; teeth 10, erect, margins convolute. <b>Seeds</b> brown, 0.6–1.2 mm diam., tuberculate; testa not inflated. <b>2n</b> = 36, 72, (108, Europe).</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;N.W.T.;Nfld. and Labr. (Nfld.);Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Ariz.;Calif.;Colo.;Conn.;Idaho;Ind.;Iowa;Maine;Mass.;Md.;Mich.;Minn.;Mo.;Mont.;N.Dak.;N.H.;N.J.;N.Mex.;N.Y.;Nebr.;Nev.;Ohio;Oreg.;Pa.;S.Dak.;Utah;Va.;Vt.;W.Va.;Wash.;Wis.;Wyo.;Worldwide.
|discussion=<p>Subspecies 2+ (2 in the flora).</p><!--
--><p>The infraspecific taxonomy of <i>Cerastium arvense</i> is subject to many different interpretations. While many subspecies have been recognized, the “actual” number is uncertain because of worldwide distribution, wide range of variation, and conflicting taxonomies.</p>
|tables=
|references={{Treatment/Reference
|id=ugborogho1974a
|text=Ugborogho, R. E. 1974. North American Cerastium arvense Linnaeus. IV. Phenotypic variation. Phyton (Horn) 32: 89–97.
}}{{Treatment/Reference
|id=ugborogho1977a
|text=Ugborogho, R. E. 1977. North American Cerastium arvense Linnaeus: Taxonomy, reproductive system and evolution. Phyton (Horn) 35: 169–187.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Taproot absent, plant strongly rhizomatous with long-creeping shoots; flowering stems usually 25-30 cm, often purple pigmented proximally, pubescence eglandular (glandular hairs present in inflorescence), soft, short or subglabrous; sepals 5-7 mm; anthers 1-1.1 mm; petals usually turning brown when dried
|[[Cerastium arvense subsp. arvense|Cerastium arvense subsp. arvense]]
|-id=key-0-1
|1
|Taprooted or shortly rhizomatous, forming clumps; flowering stems usually 5-20 cm, green or straw colored, glandular-pubescent; sepals 3.5-6(-7) mm; anthers 0.8-0.9 mm; petals usually remaining white when dried
|[[Cerastium arvense subsp. strictum|Cerastium arvense subsp. strictum]]
|}
</div></div><!--

-->{{#Taxon:
name=Cerastium arvense
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Caryophyllaceae
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;N.W.T.;Nfld. and Labr. (Nfld.);Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Ariz.;Calif.;Colo.;Conn.;Idaho;Ind.;Iowa;Maine;Mass.;Md.;Mich.;Minn.;Mo.;Mont.;N.Dak.;N.H.;N.J.;N.Mex.;N.Y.;Nebr.;Nev.;Ohio;Oreg.;Pa.;S.Dak.;Utah;Va.;Vt.;W.Va.;Wash.;Wis.;Wyo.;Worldwide.
|reference=ugborogho1974a;ugborogho1977a
|publication title=Sp. Pl.
|publication year=1753
|special status=Weedy;Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V5/V5_162.xml
|subfamily=Caryophyllaceae subfam. Alsinoideae
|genus=Cerastium
|species=Cerastium arvense
}}<!--

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[[Category:Treatment]]
[[Category:Cerastium]]
[[Category:Revision Pending]]