View source for Hypericum ascyron subsp. pyramidatum

{{Treatment/ID
|accepted_name=Hypericum ascyron subsp. pyramidatum
|accepted_authority=(Aiton) N. Robson
|publications={{Treatment/Publication
|title=Bull. Nat. Hist. Mus. London, Bot.
|place=31: 58. 2001
|year=2001
}}
|common_names=Millepertuis à grandes fleurs
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Hypericum pyramidatum
|authority=Aiton
|rank=species
|publication_title=Hort. Kew.
|publication_place=3: 103. 1789
}}
|synonyms={{Treatment/ID/Synonym
|name=H. ascyroides
|authority=Willdenow
|rank=species
}} {{Treatment/ID/Synonym
|name=H. ascyron var. americanum
|authority=(Spach) Y. Kimura
|rank=variety
}} {{Treatment/ID/Synonym
|name=H. bartramium
|authority=Michaux
|rank=species
}} {{Treatment/ID/Synonym
|name=H. macrocarpum
|authority=Spach
|rank=species
}} {{Treatment/ID/Synonym
|name=Roscyna americana
|authority=
|rank=species
}}
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Roscyna;Hypericum ascyron;Hypericum ascyron subsp. pyramidatum
|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. Roscyna]]</div><div class="higher-taxon"><small>species</small>[[Hypericum ascyron]]</div><div class="higher-taxon"><small>subspecies</small>[[Hypericum ascyron subsp. pyramidatum]]</div></div>
|volume=Volume 6
|mention_page=
|treatment_page=page 97
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>erect, branched from base and often with strict, narrowly ascending branches, 5–20 dm. <b>Stems</b>: internodes 4-lined at first, then 4-angled. <b>Leaves</b> spreading, sessile, amplexicaul; blade ovate-lanceolate to lanceolate or oblong, 40–85 × 18–37 mm on main stem, smaller distally and on branches, base rounded to cordate, margins plane, apex usually acute to apiculate, sometimes obtuse, midrib with 4–7 pairs of branches, tertiary veins densely reticulate toward margins. <b>Inflorescences</b> cylindric to narrowly pyramidal, 1–35-flowered. <b>Flowers</b>: sepals ovate to lanceolate or oblong-elliptic, subequal or equal, 8–13 × 4–8 mm, apex acute to acuminate; petals golden yellow, sometimes red-tinged, narrowly obovate to oblanceolate-falcate, 25–40 mm; styles (4–)5, 3–7 mm. <b>Capsules</b> ovoid, 12–20(–30) × 10–13 mm. <b>Seeds</b> 1.5 mm, narrowly winged; testa shallowly linear-reticulate.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jun–Aug).
|habitat=Stream sides, roadside ditches, fens, damp meadows
|elevation=0–1500 m
|distribution=Ont.;Que.;Conn.;Ill.;Ind.;Iowa;Kans.;Md.;Mass.;Mich.;Minn.;Mo.;N.Y.;Ohio;Pa.;Vt.;Wis.
|discussion=<p>The American populations of <i>Hypericum ascyron</i> sometimes have been treated as distinct from those of eastern Asia, usually as H. pyramidatum. These populations can be distinguished by the combination of relatively broad leaves, acute sepals, and, usually, almost distinct styles; they are better treated as <i></i>subsp.<i> pyramidatum</i> (see N. K. B. Robson 2001). The scattered American distribution of <i>Hypericum ascyron</i>, which seems to coincide well with earlier Native American campsites, led W. G. Dore (in herbarium notes) to suggest that it was distributed by aborigines for an as yet unknown reason (see J. M. Gillett and N. K. B. Robson 1981).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hypericum ascyron subsp. pyramidatum
|authority=(Aiton) N. Robson
|rank=subspecies
|parent rank=species
|synonyms=H. ascyroides;H. ascyron var. americanum;H. bartramium;H. macrocarpum;Roscyna americana
|basionyms=Hypericum pyramidatum
|family=Hypericaceae
|phenology=Flowering summer (Jun–Aug).
|habitat=Stream sides, roadside ditches, fens, damp meadows
|elevation=0–1500 m
|distribution=Ont.;Que.;Conn.;Ill.;Ind.;Iowa;Kans.;Md.;Mass.;Mich.;Minn.;Mo.;N.Y.;Ohio;Pa.;Vt.;Wis.
|reference=None
|publication title=Bull. Nat. Hist. Mus. London, Bot.
|publication year=2001
|special status=Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V6/V6_169.xml
|genus=Hypericum
|section=Hypericum sect. Roscyna
|species=Hypericum ascyron
|subspecies=Hypericum ascyron subsp. pyramidatum
}}<!--

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