View source for Hypericum kalmianum

{{Treatment/ID
|accepted_name=Hypericum kalmianum
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 783. 1753
|year=1753
}}
|common_names=Kalm’s St. John’s wort;millepertuis de Kalm
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Norysca kalmiana
|authority=(Linnaeus) K. Koch
|rank=species
}}
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Myriandra;Hypericum kalmianum
|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. Myriandra]]</div><div class="higher-taxon"><small>species</small>[[Hypericum kalmianum]]</div></div>
|volume=Volume 6
|mention_page=page 75, 76
|treatment_page=page 77
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> erect, forming slender to rounded or flat-topped bush, (1.4–)2–6(–10) dm. <b>Stems</b>: internodes 4-lined at first, then terete. <b>Leaf</b> blades narrowly oblong to oblanceolate or linear, (15–)20–45 × 3–7(–10) mm, base articulated, narrowly cuneate to subattenuate, margins subrecurved to revolute, apex rounded to obtuse, midrib with 9–14 pairs of branches. <b>Inflorescences</b> usually (1–)3–7(+)-flowered from apical node, rarely with flowers from 1–2 proximal nodes. <b>Flowers</b> 20–35 mm diam.; sepals deciduous, not enclosing capsule, (4–)5, elliptic or oblong to obovate, subequal, 4–9 × 1.5–5 mm; petals (4–)5, golden yellow, obovate to oblong, 8–15 mm; stamens deciduous, 150–200; ovary (3–)5(–6)-merous. <b>Capsules</b> narrowly ovoid-conic, 7–11 × 4–7 mm. <b>Seeds</b> narrowly carinate, 0.7–1.1 mm; testa subscalariform. <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jul–Aug).
|habitat=Sandy or calcareous dune slacks or swales, rocky shores, plains and low prairies, along streams, sphagnum-sedge swamps
|elevation=10–400 m
|distribution=Ont.;Que.;Ill.;Ind.;Mich.;N.Y.;Ohio;Wis.
|discussion=<p><i>Hypericum kalmianum</i> is a northern derivative of <i>H. prolificum</i> with shorter stems, narrower leaves, fewer and larger flowers, and, usually, five styles and placentae. Natural hybrids with <i>H. prolificum</i> have been reported from Wisconsin.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hypericum kalmianum
|authority=Linnaeus
|rank=species
|parent rank=section
|synonyms=Norysca kalmiana
|basionyms=
|family=Hypericaceae
|phenology=Flowering summer (Jul–Aug).
|habitat=Sandy or calcareous dune slacks or swales, rocky shores, plains and low prairies, along streams, sphagnum-sedge swamps
|elevation=10–400 m
|distribution=Ont.;Que.;Ill.;Ind.;Mich.;N.Y.;Ohio;Wis.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V6/V6_118.xml
|genus=Hypericum
|section=Hypericum sect. Myriandra
|species=Hypericum kalmianum
}}<!--

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