View source for Echinodorus

{{Treatment/ID
|accepted_name=Echinodorus
|accepted_authority=Richard & Engelmann ex A. Gray
|publications={{Treatment/Publication
|title=Manual
|place=460. 1848
|year=1848
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Helianthium
|authority=(Engelmann ex Hooker f.) J. G. Smith
}}
|hierarchy=Alismataceae;Echinodorus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Alismataceae]]</div><div class="higher-taxon"><small>genus</small>[[Echinodorus]]</div></div>
|etymology=Greek echius, rough husk, and doros, leathern bottle, alluding to ovaries, which in some species are armed with persistent styles, forming prickly head of fruit
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual or perennial, emersed, floating-leaved, or rarely submersed, glabrous to stellate-pubescent; rhizomes present or absent; stolons absent; corms absent; tubers absent. <b>Roots</b> not septate. <b>Leaves</b> sessile or petiolate; petioles triangular, rarely terete; blade with translucent markings as dots or lines present or absent, linear to lanceolate to ovate, base attenuate to cordate, margins entire or undulating, apex obtuse to acute. <b>Inflorescences</b> racemes or panicles, rarely umbels, of 1–18 whorls, erect or decumbent, emersed; bracts coarse, apex obtuse to acute, surfaces smooth or papillose along veins, apex obtuse to acute. <b>Flowers</b> bisexual, subsessile to pedicellate; bracts subtending pedicels, subulate to lanceolate, shorter than to longer than pedicels, apex obtuse to acute; pedicels ascending to recurved; receptacle convex; sepals recurved to spreading, herbaceous to leathery, sculpturing absent; petals white, entire; stamens 9–25; filaments linear, glabrous; pistils 15–250 or more, spirally arranged on convex receptacle, forming head, distinct; ovules 1; style terminal or lateral. <b>Fruits</b> plump, often longitudinally ribbed, sometimes flattened, rarely abaxially keeled, abaxial wings absent, lateral wings absent, glands often present.</span><!--

-->{{Treatment/Body
|distribution=Western Hemisphere.
|discussion=<p>Species 26 (4 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=fassett1955a
|text=Fassett, N. C. 1955. Echinodorus in the American tropics. Rhodora 57: 133--156, 174--188, 202--212.
}}{{Treatment/Reference
|id=haynes1986a
|text=Haynes, R. R. and L. B. Holm-Nielsen. 1986. Notes on Echinodorus (Alismataceae). Brittonia 38: 325--332.
}}{{Treatment/Reference
|id=rataj1975a
|text=Rataj, K. 1975. Revizion [sic] of the Genus Echinodorus Rich. Prague.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Pistils 15–20; submersed leaves mostly present, sessile; emersed leaves narrowly lanceolate to ovate; plants relatively delicate
|[[Echinodorus tenellus|Echinodorus tenellus]]
|-id=key-0-1
|1
|Pistils 45–250; submersed leaves mostly absent, when present, petiolate; emersed
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Inflorescence decumbent to arching, proliferating; sepal veins papillate
|[[Echinodorus cordifolius subsp. cordifolius|Echinodorus cordifolius subsp. cordifolius]]
|-id=key-0-2
|2
|Inflorescence erect, not proliferating; sepal veins not papillate.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Stamens 9–15; plants to 70 cm.
|[[Echinodorus berteroi|Echinodorus berteroi]]
|-id=key-0-3
|3
|Stamens 21; plants to 200 cm.
|[[Echinodorus floridanus|Echinodorus floridanus]]
|}
</div></div><!--

-->{{#Taxon:
name=Echinodorus
|author=
|authority=Richard & Engelmann ex A. Gray
|rank=genus
|parent rank=family
|synonyms=Helianthium
|basionyms=
|family=Alismataceae
|distribution=Western Hemisphere.
|reference=fassett1955a;haynes1986a;rataj1975a
|publication title=Manual
|publication year=1848
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V22/V22_628.xml
|genus=Echinodorus
}}<!--

-->[[Category:Treatment]][[Category:Alismataceae]]