View source for Amaranthus crassipes

{{Treatment/ID
|accepted_name=Amaranthus crassipes
|accepted_authority=Schlechtendal
|publications={{Treatment/Publication
|title=Linnaea
|place=6: 757. 1831
|year=1831
}}
|common_names=Clubfoot amaranth;spreading amaranth;tropical spreading amaranth
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Amaranthus crassipes var. warnockii
|authority=(I. M. Joh nston) Henrickson
}} {{Treatment/ID/Synonym
|name=Amaranthus warnockii
|authority=unknown
}}
|hierarchy=Amaranthaceae;Amaranthus;Amaranthus subg. Albersia;Amaranthus crassipes
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Amaranthaceae]]</div><div class="higher-taxon"><small>genus</small>[[Amaranthus]]</div><div class="higher-taxon"><small>subgenus</small>[[Amaranthus subg. Albersia]]</div><div class="higher-taxon"><small>species</small>[[Amaranthus crassipes]]</div></div>
|volume=Volume 4
|mention_page=page 432
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual, glabrous. <b>Stems</b> prostrate or weakly ascending, erect when young, branched mostly from base, 0.1–0.6 m. <b>Leaves</b>: petiole nearly 1/2 as long as blade; blade broadly elliptic, obovate, orbiculate, or oblanceolate, (0.5–)1–3(–4.5) × 0.3–2(–2.5) cm, base cuneate, margins entire, plane to undulate, apex broadly rounded or emarginate. <b>Inflorescences</b> axillary clusters borne from base to apex, axes much thickened, appearing inflated, becoming indurate at maturity (only in <i>A. scleropoides</i> and <i>A. crassipes</i>). <b>Bracts</b> of pistillate flowers keeled (only <i>A. scleropoides</i> and <i>A. crassipes</i> have keeled bracts), deltate, 0.5–0.9 mm. <b>Pistillate</b> flowers: tepals (4–)5, narrowly spatulate, clawed, with small expanded blade, equal or subequal, 2–3 mm, apex rounded and apiculate; claws becoming indurate and scarious at maturity; style branches spreading; stigmas usually 2(–3), almost sessile. <b>Staminate</b> flowers intermixed with pistillate; tepals 5, membranaceous; stamens 3(–5). <b>Utricles</b> obovoid to compressed-obovoid, 1.4–2 mm, shorter than tepals, prominently muricate (especially in distal 1/2), indehiscent. <b>Seeds</b> dark brownish or reddish black to black, compressed-ovoid to broadly lenticular, 1–1.4 mm diam., shiny.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer and fall.
|habitat=Open, seasonally wet flats, shores of water bodies, waste places, other disturbed habitats
|elevation=0-1300 m
|distribution=Ala.;Ariz.;Fla.;La.;N.Mex.;S.C.;Tex.;ne Mexico;West Indies;n South America;occasionally introduced in other regions.
|discussion=<p>Two varieties have been distinguished by J. Henrickson (1999) within <i>Amaranthus crassipes</i>: var. crassipes with leaf blades nearly orbiculate to ovate (obovate) and conspicuous veins on the green to yellow-green abaxial leaf surface; and <i></i></i>var.<i><i> warnockii</i> (I. M. Johnston) Henrickson (= A. warnockii I. M. Johnston) with narrower oblanceolate grayish leaves with less distinct venation on the abaxial leaf surfaces. In Henrickson’s treatment, var. crassipes occurs mostly in the coastal areas (and is also reported for Arizona), while <i></i></i>var.<i><i> warnockii</i> is reported from inland southwestern Texas and the Chihuahuan Desert region (Mexico: Coahuila, Chihuahua). We have not seen material of the new varieties and cannot evaluate their validity.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Amaranthus crassipes
|author=
|authority=Schlechtendal
|rank=species
|parent rank=subgenus
|synonyms=Amaranthus crassipes var. warnockii;Amaranthus warnockii
|basionyms=
|family=Amaranthaceae
|phenology=Flowering summer and fall.
|habitat=Open, seasonally wet flats, shores of water bodies, waste places, other disturbed habitats
|elevation=0-1300 m
|distribution=Ala.;Ariz.;Fla.;La.;N.Mex.;S.C.;Tex.;ne Mexico;West Indies;n South America;occasionally introduced in other regions.
|reference=None
|publication title=Linnaea
|publication year=1831
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V4/V4_846.xml
|genus=Amaranthus
|subgenus=Amaranthus subg. Albersia
|species=Amaranthus crassipes
}}<!--

-->[[Category:Treatment]][[Category:Amaranthus subg. Albersia]]