View source for Tripleurospermum maritimum

{{Treatment/ID
|accepted_name=Tripleurospermum maritimum
|accepted_authority=(Linnaeus) W. D. J. Koch
|publications={{Treatment/Publication
|title=Syn. Fl. Germ. Helv. ed.
|place=2, 1026. 1845
|year=1845
}}
|common_names=False mayweed
|basionyms={{Treatment/ID/Basionym
|name=Matricaria maritima
|authority=Linnaeus
|rank=species
|publication_title=Sp. Pl.
|publication_place=2: 891. 1753
}}
|synonyms={{Treatment/ID/Synonym
|name=Chamomilla maritima
|authority=(Linnaeus) Rydberg
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Anthemideae;Tripleurospermum;Tripleurospermum maritimum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Anthemideae]]</div><div class="higher-taxon"><small>genus</small>[[Tripleurospermum]]</div><div class="higher-taxon"><small>species</small>[[Tripleurospermum maritimum]]</div></div>
|volume=Volume 19
|mention_page=page 548, 549
|treatment_page=page 550
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>(sometimes biennials), 10–50(–80) cm. <b>Stems</b> 1–5+, usually procumbent, sometimes ascending (± erect), branched distally, glabrous or sparsely hairy. <b>Leaf</b> blades 2–8 cm, ultimate lobes ± cylindric, 4–20 mm, ± fleshy, apices obtuse or mucronate. <b>Heads</b> (3–)10–50 in corymbiform arrays or borne singly. <b>Phyllaries</b> centrally dark greenish or brownish, oblong to narrowly triangular or broadly triangular, unequal, scarious margins pale to dark brown or blackish brown, 0.2–1 mm wide. <b>Ray</b> florets 10–34+; corollas 10–16[–20] mm. <b>Disc</b> corollas ca. 2.5 mm. <b>Cypselae</b> pale to dark blackish brown, ribs ± contiguous or separated by less than 1/4 their widths (1–2 supernumerary ribs sometimes present), abaxial-apical resin glands elongate (lengths 2+ times widths), abaxial faces transversely rugose, minutely roughened on faces and between ribs. <b>2n</b> = 18, 36.</span><!--

-->{{Treatment/Body
|distribution=Man.;N.B.;N.S.;N.W.T.;Nfld. and Labr. (Nfld.);Nunavut;Ont.;Que.;Yukon;Alaska;Calif.;Maine;Mass.;Pa.;Eurasia.
|discussion=<p>Subspecies 3 (2 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Phyllaries oblong or narrowly triangular, scarious margins pale to dark brown, 0.2–0.4 mm wide; cypselae: resin gland lengths often much more than twice widths; coastal ne North America
|[[Tripleurospermum maritimum subsp. maritimum|Tripleurospermum maritimum subsp. maritimum]]
|-id=key-0-1
|1
|Phyllaries broadly triangular, scarious margins blackish brown, 0.4–1 mm wide; cypselae: resin gland lengths usually little more than twice widths; coastal arctic
|[[Tripleurospermum maritimum subsp. phaeocephalum|Tripleurospermum maritimum subsp. phaeocephalum]]
|}
</div></div><!--

-->{{#Taxon:
name=Tripleurospermum maritimum
|authority=(Linnaeus) W. D. J. Koch
|rank=species
|parent rank=genus
|synonyms=Chamomilla maritima
|basionyms=Matricaria maritima
|family=Asteraceae
|distribution=Man.;N.B.;N.S.;N.W.T.;Nfld. and Labr. (Nfld.);Nunavut;Ont.;Que.;Yukon;Alaska;Calif.;Maine;Mass.;Pa.;Eurasia.
|reference=None
|publication title=Syn. Fl. Germ. Helv. ed.
|publication year=1845
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V19_957.xml
|tribe=Asteraceae tribe Anthemideae
|genus=Tripleurospermum
|species=Tripleurospermum maritimum
}}<!--

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[[Category:Treatment]]
[[Category:Tripleurospermum]]
[[Category:Revision Pending]]