View source for Hypericum tetrapetalum

{{Treatment/ID
|accepted_name=Hypericum tetrapetalum
|accepted_authority=Lamarck in J. Lamarck et al.
|publications={{Treatment/Publication
|title=in J. Lamarck et al., Encycl.
|place=4: 153. 1797
|year=1797
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Ascyrum amplexicaule
|authority=Michaux
}} {{Treatment/ID/Synonym
|name=A. cubense
|authority=Grisebach
}} {{Treatment/ID/Synonym
|name=A. tetrapetalum
|authority=(Lamarck) Vail
}}
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Myriandra;Hypericum tetrapetalum
|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 tetrapetalum]]</div></div>
|volume=Volume 6
|mention_page=page 74
|treatment_page=page 86
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>(perennial) or shrubs, erect, with woody base, usually unbranched, sometimes with divaricate or ascending branches, 2–10 dm. <b>Stems</b>: internodes (2–)4-lined at first, then 2-lined to terete. <b>Leaf</b> blades oblong-ovate to ovate or triangular-ovate, 5–35 × 4–15 mm, base articulated, cordate-amplexicaul, margins subrecurved, apex apiculate or obtuse to rounded, midrib with 1 pair of branches. <b>Inflorescences</b> terminal, 1(–3)-flowered, branching from apical node pseudodichotomous, sometimes with relatively short branches from to 3 proximal nodes. <b>Flowers</b> 20–30 mm diam.; sepals persistent, enclosing capsule, 4, unequal, outer broadly ovate, 7–15 × 5.5–10 mm, apex subapiculate to obtuse, inner narrowly lanceolate, 7–15 × 2–3 mm, apex acute; petals 4, bright yellow, obovate-oblong, 10–15 mm; stamens persistent, 100; ovary 3-merous. <b>Capsules</b> broadly ellipsoid-ovoid to subglobose, 5–6 × 3.5–4 mm. <b>Seeds</b> not carinate, 0.7 mm; testa shallowly scalariform. <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|phenology=Flowering winter–spring (Jan–Apr), late summer (Jul–Sep).
|habitat=Moist, low pinelands, ditches
|elevation=0–200 m
|distribution=Ala.;Fla.;Ga.;West Indies (w Cuba).
|discussion=<p><i>Hypericum tetrapetalum</i> differs from <i>H. crux-andreae</i> in having broader leaves with strongly cordate-amplexicaul bases and, nearly always, by terminal pseudodichotomous inflorescences.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hypericum tetrapetalum
|author=
|authority=Lamarck in J. Lamarck et al.
|rank=species
|parent rank=section
|synonyms=Ascyrum amplexicaule;A. cubense;A. tetrapetalum
|basionyms=
|family=Hypericaceae
|phenology=Flowering winter–spring (Jan–Apr), late summer (Jul–Sep).
|habitat=Moist, low pinelands, ditches
|elevation=0–200 m
|distribution=Ala.;Fla.;Ga.;West Indies (w Cuba).
|reference=None
|publication title=in J. Lamarck et al., Encycl.
|publication year=1797
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V6/V6_141.xml
|genus=Hypericum
|section=Hypericum sect. Myriandra
|species=Hypericum tetrapetalum
}}<!--

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