View source for Acmella

{{Treatment/ID
|accepted_name=Acmella
|accepted_authority=Richard in C. H. Persoon
|publications={{Treatment/Publication
|title=in C. H. Persoon, Syn. Pl.
|place=2: 472. 1807
|year=1807
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ecliptinae;Acmella
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Ecliptinae]]</div><div class="higher-taxon"><small>genus</small>[[Acmella]]</div></div>
|etymology=From a Singhalese name for a plant now known as Blainvillea acmella (Linnaeus) Philipson
|volume=Volume 21
|mention_page=page 64, 65, 67
|treatment_page=page 132
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>or perennials, 10–20(–30+) cm. <b>Stems</b> prostrate to erect, usually branched ± throughout. <b>Leaves</b> cauline; opposite; petiolate [± sessile]; blades (usually 3-nerved) ovate to rhombic or lanceolate [linear to filiform], bases ± cuneate, margins entire or toothed, faces sparsely pilose to strigillose, glabrescent. <b>Heads</b> radiate or discoid [disciform], borne singly at tips of branches [corymbiform arrays]. <b>Involucres</b> ± hemispheric to ovoid, 3–6+ mm diam. <b>Phyllaries</b> persistent, 8–15+ in 1–3 series (distinct, ovate to linear, subequal or outer longer). <b>Receptacles</b> conic, paleate (paleae falling with fruit, ± navicular, membranous to scarious, each about equaling subtended floret). <b>Ray</b> florets 0 or 5–20+, pistillate, fertile; corollas yellow to orange [white or purplish] (laminae ovate to linear) [wanting]. <b>Disc</b> florets 25–100(–200+) bisexual, fertile; corollas yellow [orange], tubes shorter than campanulate throats, lobes 4–5, deltate. <b>Cypselae</b> 2–3-angled (peripheral) or strongly compressed, ellipsoid to obovoid (glabrous or ciliate on the 2–3 angles or ribs); pappi 0, or fragile, of 1–3 awnlike bristles. <b>x</b> = 13.</span><!--

-->{{Treatment/Body
|distribution=s United States;Mexico;West Indies;Central America;South America;introduced in Asia;Africa;Pacific Islands;Australia.
|discussion=<p>Species 30 (2 in the flora).</p><!--
--><p><i>Acmella</i> pilosa R. K. Jansen has been reported as introduced in Florida (http://www.plantatlas.usf.edu); it differs from <i>A. repens</i> mainly by its more densely pilose stems and leaves and more truncate to cordate (versus cuneate) leaf bases.</p>
|tables=
|references={{Treatment/Reference
|id=jansen1985a
|text=Jansen, R. K. 1985. The systematics of Acmella (Asteraceae–Heliantheae). Syst. Bot. Monogr. 8: 1–115.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Petioles 3–40+ mm; leaf blades ovate to lance-ovate, mostly 20–40(–100) × 10–35 mm, margins dentate to denticulate or entire
|[[Acmella repens|Acmella repens]]
|-id=key-0-1
|1
|Petioles 2–4 mm; leaf blades lanceolate, mostly 12–40 × 3–10 mm, margins usually sinuate-dentate, rarely entire
|[[Acmella pusilla|Acmella pusilla]]
|}
</div></div><!--

-->{{#Taxon:
name=Acmella
|author=John L. Strother
|authority=Richard in C. H. Persoon
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Barbara Alongi
|distribution=s United States;Mexico;West Indies;Central America;South America;introduced in Asia;Africa;Pacific Islands;Australia.
|reference=jansen1985a
|publication title=in C. H. Persoon, Syn. Pl.
|publication year=1807
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_322.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae
|genus=Acmella
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae (tribe Heliantheae) subtribe Ecliptinae]]