View source for Hypericum mutilum

{{Treatment/ID
|accepted_name=Hypericum mutilum
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 787. 1753
|year=1753
}}
|common_names=Dwarf St. John’s wort
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Sarothra mutila
|authority=(Linnaeus) Y. Kimura
}}
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Brathys;Hypericum mutilum
|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 mutilum]]</div></div>
|volume=Volume 6
|mention_page=page 86, 89, 92, 94
|treatment_page=page 93
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>annual or perennial, usually erect, sometimes decumbent and rooting, basal branches sometimes present, usually with to 10 pairs of spreading branches distal to middle, 0.5–8 dm. <b>Stems</b>: internodes 4-angled. <b>Leaves</b> spreading, sessile or amplexicaul; blade paler abaxially, ovate, elliptic, or elliptic-oblong (proximal), ovate or suborbiculate to elliptic or lanceolate (mid and distal), 3–27(–40) × 1–15 mm, papery to membranous, margins plane, apex obtuse to rounded, basal veins 3–5, midrib with to 3 pairs of branches. <b>Inflorescences</b> cylindric, 5–60-flowered, branching mostly dichasial; bracts linear-subulate. <b>Flowers</b> 3–5 mm diam.; sepals lanceolate to linear-lanceolate or elliptic-oblong to oblanceolate, equal or unequal, 2–4.5 × 0.6–1.5 mm, margins sometimes ciliate, not setulose-ciliate, apex usually acute to apiculate, sometimes obtuse to rounded; petals pale yellow, oblong, 1.7–3.5 mm; stamens 5–16, scarcely grouped; styles 0.5 mm; stigmas broadly capitate. <b>Capsules</b> narrowly ovoid to cylindric-ellipsoid, 2–5 × 1.6–2.4 mm, usually broadest at or near middle. <b>Seeds</b> 0.4–0.7 mm; testa finely linear-scalariform.</span><!--

-->{{Treatment/Body
|distribution=c;e North America;introduced in w North America.
|discussion=<p>Subspecies 2 (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
|Stems: apical internode shorter than adjacent one or almost absent; inflorescences: branching mostly dichasial from 2–10 nodes.
|[[Hypericum mutilum subsp. mutilum|Hypericum mutilum subsp. mutilum]]
|-id=key-0-1
|1
|Stems: apical internode usually longer than adjacent one; inflorescences: branching from 1–4(–6) nodes, branches diffuse and repeatedly monochasial distally.
|[[Hypericum mutilum subsp. latisepalum|Hypericum mutilum subsp. latisepalum]]
|}
</div></div><!--

-->{{#Taxon:
name=Hypericum mutilum
|author=
|authority=Linnaeus
|rank=species
|parent rank=section
|synonyms=Sarothra mutila
|basionyms=
|family=Hypericaceae
|distribution=c;e North America;introduced in w North America.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V6/V6_158.xml
|genus=Hypericum
|section=Hypericum sect. Brathys
|species=Hypericum mutilum
}}<!--

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