View source for Hypericum majus

{{Treatment/ID
|accepted_name=Hypericum majus
|accepted_authority=(A. Gray) Britton
|publications={{Treatment/Publication
|title=Mem. Torrey Bot. Club
|place=5: 225. 1894
|year=1894
}}
|common_names=Large St. John’s wort;millepertuis majeur
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Hypericum canadense var. majus
|authority=A. Gray
|publication_title=Manual ed.
|publication_place=5, 86. 1867 (as major)
}}
|synonyms={{Treatment/ID/Synonym
|name=H. mutilum var. longifolium
|authority=R. Keller
}} {{Treatment/ID/Synonym
|name=Sarothra major
|authority=(A. Gray) Y. Kimura
}}
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Brathys;Hypericum majus
|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 majus]]</div></div>
|volume=Volume 6
|mention_page=page 89, 92
|treatment_page=page 91
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>perennial, erect, branching at base and in inflorescence, branches relatively few, 0.5–7 dm. <b>Stems</b>: internodes 4-angled. <b>Leaves</b> spreading, sessile or distal subamplexicaul; blade lanceolate to narrowly oblong-elliptic or (proximal) oblanceolate, 10–45 × (2–)6–12 mm, papery to membranous, margins plane, apex acute to rounded, basal or near-basal veins (3–)5–7, midrib with to 4 pairs of branches. <b>Inflorescences</b> corymbiform to cylindric, 3–30-flowered, usually compact, branching mostly dichasial. <b>Flowers</b> 6–7 mm diam.; sepals lanceolate to narrowly elliptic, equal, 3.5–6.5 × 0.8–1.5 mm, margins sometimes ciliate, not setulose-ciliate, apex acute; petals golden yellow, sometimes red-veined, oblanceolate, 3.5–6 mm; stamens 12–21, obscurely 5-fascicled; styles 0.6–1 mm; stigmas broadly capitate. <b>Capsules</b> narrowly conic-ellipsoid, 4–8 × 2.5–3.5 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, ditches, lake and stream margins, other damp habitats
|elevation=0–1200 m
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Ont.;P.E.I.;Que.;Sask.;Colo.;Conn.;Idaho;Ill.;Ind.;Iowa;Kans.;Maine;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Oreg.;Pa.;R.I.;S.Dak.;Vt.;Wash.;Wis.;introduced in Europe (France;Germany);e Asia (Japan).
|discussion=<p><i>Hypericum majus</i> was the western member of a vicariant species pair, differing from the originally eastern member (<i>H. canadense</i>) by the broader leaves, usually more-congested inflorescence, and larger flowers. These species became sympatric in glaciated northeastern North America and now hybridize freely, notably in Wisconsin (F. H. Utech and H. H. Iltis 1970). Hybrids are intermediate in form between the parents and have also been recorded from Connecticut, Massachusetts, and New Hampshire. <i>Hypericum majus</i> hybridizes also with <i>H. mutilum</i>, with <i></i></i>subsp.<i><i> mutilum</i> in Maine, and with <i></i></i>subsp.<i><i> boreale</i> in Michigan and Wisconsin.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hypericum majus
|author=
|authority=(A. Gray) Britton
|rank=species
|parent rank=section
|synonyms=H. mutilum var. longifolium;Sarothra major
|basionyms=Hypericum canadense var. majus
|family=Hypericaceae
|phenology=Flowering summer (Jun–Sep).
|habitat=Fens, marshes, ditches, lake and stream margins, other damp habitats
|elevation=0–1200 m
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Ont.;P.E.I.;Que.;Sask.;Colo.;Conn.;Idaho;Ill.;Ind.;Iowa;Kans.;Maine;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Oreg.;Pa.;R.I.;S.Dak.;Vt.;Wash.;Wis.;introduced in Europe (France;Germany);e Asia (Japan).
|reference=None
|publication title=Mem. Torrey Bot. Club
|publication year=1894
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V6/V6_155.xml
|genus=Hypericum
|section=Hypericum sect. Brathys
|species=Hypericum majus
}}<!--

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