View source for Hypericum canadense

{{Treatment/ID
|accepted_name=Hypericum canadense
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 785. 1753
|year=1753
}}
|common_names=Canadian St. John’s wort;millepertuis de Canada
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=W
|label=Weedy
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Brathys canadensis
|authority=(Linnaeus) Spach
|rank=species
}} {{Treatment/ID/Synonym
|name=Hypericum canadense var. galiiforme
|authority=Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=H. canadense var. magninsulare
|authority=Weatherby
|rank=variety
}} {{Treatment/ID/Synonym
|name=H. canadense var. minimum
|authority=Choisy
|rank=variety
}}
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Brathys;Hypericum canadense
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hypericaceae]]</div><div class="higher-taxon"><small>genus</small>[[Hypericum]]</div><div class="higher-taxon"><small>section</small>[[Hypericum sect. Brathys]]</div><div class="higher-taxon"><small>species</small>[[Hypericum canadense]]</div></div>
|volume=Volume 6
|mention_page=page 89, 93
|treatment_page=page 92
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>annual or perennial, erect, basal branches relatively few or none, usually with strict, ascending branches from distal nodes, 0.3–7.5 dm. <b>Stems</b>: internodes 4-angled. <b>Leaves</b> erect or spreading, sessile or subsessile; blade linear to oblanceolate-linear or (proximal) oblanceolate to obovate, 6–55 × 0.5–5.5 mm, papery to membranous, margins plane, apex rounded, basal or near-basal veins 1–3(–5), midrib with 1–4 pairs of branches. <b>Inflorescences</b> corymbiform to cylindric, usually diffuse, 1–35-flowered, branching mostly dichasial. <b>Flowers</b> 5–6 mm diam.; sepals linear-lanceolate to lanceolate, equal, 2.5–4.5 × 0.8–1 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate; petals golden yellow, sometimes red-veined, narrowly obovate to elliptic, 2.5–4 mm; stamens 12–25, obscurely 3–5-fascicled; styles 0.5–0.8 mm; stigmas broadly capitate. <b>Capsules</b> narrowly conic to conic-cylindric, 4–6 × 1.5–3 mm, broadest proximal to middle. <b>Seeds</b> 0.5–0.7 mm; testa finely linear-scalariform. <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jun–Sep).
|habitat=Fens, marshes, depressions, lake and pond margins
|elevation=0–500 m
|distribution=St. Pierre and Miquelon;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;N.H.;N.J.;N.Y.;N.C.;Ohio;Oreg.;Pa.;R.I.;S.C.;Tenn.;Vt.;Va.;Wash.;W.Va.;Wis.;introduced in Europe (Ireland;The Netherlands).
|discussion=<p><i>Hypericum canadense</i> is closely related to <i>H. majus</i>; it hybridizes with that species and with <i>H. mutilum</i>, producing intermediate forms. <i>Hypericum</i> ×dissimulatum E. P. Bicknell appears to comprise a continuous series of hybrids between <i>H. canadense</i> and</p><!--
--><p><i>H. mutilum</i> or <i>H. boreale</i> such that it is not always possible to say which of these species is involved. <i>Hypericum</i> ×dissimulatum has been recorded from New Brunswick, Newfoundland, Nova Scotia, Ontario, and Quebec and from Connecticut, Maine, Maryland, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, and Virginia.</p><!--
--><p>J. Rousseau reduced <i>Hypericum canadense</i> var. minimum to a form; it does not seem to merit any recognition.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hypericum canadense
|authority=Linnaeus
|rank=species
|parent rank=section
|synonyms=Brathys canadensis;Hypericum canadense var. galiiforme;H. canadense var. magninsulare;H. canadense var. minimum
|basionyms=
|family=Hypericaceae
|phenology=Flowering summer (Jun–Sep).
|habitat=Fens, marshes, depressions, lake and pond margins
|elevation=0–500 m
|distribution=St. Pierre and Miquelon;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;N.H.;N.J.;N.Y.;N.C.;Ohio;Oreg.;Pa.;R.I.;S.C.;Tenn.;Vt.;Va.;Wash.;W.Va.;Wis.;introduced in Europe (Ireland;The Netherlands).
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Endemic;Illustrated;Weedy
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V6/V6_156.xml
|genus=Hypericum
|section=Hypericum sect. Brathys
|species=Hypericum canadense
}}<!--

-->[[Category:Treatment]][[Category:Hypericum sect. Brathys]]