View source for Echinochloa crus-pavonis

{{Treatment/ID
|accepted_name=Echinochloa crus-pavonis
|accepted_authority=
|publications=
|common_names=Gulf barnyard grass
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Paniceae;Echinochloa;Echinochloa crus-pavonis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Panicoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Paniceae]]</div><div class="higher-taxon"><small>genus</small>[[Echinochloa]]</div><div class="higher-taxon"><small>species</small>[[Echinochloa crus-pavonis]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 398
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism duration;whole_organism duration;whole_organism growth form;whole-organism duration"><b>Plants </b>annual or short-lived perennials.</span> <span class="statement" id="st-d0_s1" data-properties="culm some measurement"><b>Culms </b>30-150 cm;</span> <span class="statement" id="st-d0_s2" data-properties="node pubescence">nodes glabrous.</span> <span class="statement" id="st-d0_s3" data-properties="sheath pubescence;sheath coloration"><b>Sheaths </b>glabrous, often purplish;</span> <span class="statement" id="st-d0_s4" data-properties="ligule presence">ligules absent;</span> <span class="statement" id="st-d0_s5" data-properties="blade length;blade width;blade pubescence">blades 12-60 cm long, 10-25 mm wide, glabrous.</span> <span class="statement" id="st-d0_s6" data-properties="panicle some measurement;panicle orientation;panicle orientation;node pubescence;hair architecture;internode pubescence"><b>Panicles </b>10-30 cm, erect or drooping, nodes sparsely hispid, hairs papillose-based, internodes glabrous;</span> <span class="statement" id="st-d0_s7" data-properties="primary branch some measurement;node pubescence;hair architecture;internode pubescence">primary branches to 14 cm, nodes sometimes sparsely hispid, hairs papillose-based, internodes usually glabrous;</span> <span class="statement" id="st-d0_s8" data-properties="secondary branch some measurement">secondary branches to 3 cm.</span> <span class="statement" id="st-d0_s9" data-properties="spikelet length;spikelet width;spikelet architecture"><b>Spikelets </b>2.5-3.4 mm long, 1.2-1.4 mm wide, disarticulating at maturity.</span> <span class="statement" id="st-d0_s10" data-properties="upper glume size"><b>Upper </b>glumes subequal to the spikelets;</span> <span class="statement" id="st-d0_s11" data-properties="lower floret reproduction">lower florets sterile;</span> <span class="statement" id="st-d0_s12" data-properties="lower lemma architecture or shape;awn atypical some measurement;awn some measurement;awn course">lower lemmas unawned or awned, awns 3-10 (15) mm, curved;</span> <span class="statement" id="st-d0_s13" data-properties="lower palea presence;lower palea prominence;lower palea development">lower paleas absent, vestigial, or well-developed;</span> <span class="statement" id="st-d0_s14" data-properties="upper lemma arrangement or shape;upper lemma shape;upper lemma shape;upper lemma pubescence;upper lemma pubescence;tip variability;tip life cycle">upper lemmas narrowly elliptic, not or scarcely exceeding the upper glumes, acute or obtuse, with a well-differentiated, early-withering tip, glabrous or pubescent at the base of the tip, hairs not forming a line across the base;</span> <span class="statement" id="st-d0_s15" data-properties="anther some measurement">anthers 0.5-0.7 mm.</span> <span class="statement" id="st-d0_s16" data-properties="caryopsis length;caryopsis width"><b>Caryopses </b>1.2-1.5 mm long, 1-1.3 mm wide;</span> <span class="statement" id="st-d0_s17" data-properties="">embryos 50-70% as long as the caryopses.</span> <span class="statement" id="st-d0_s18" data-properties="2n chromosome quantity">2n = 36.</span><!--

-->{{Treatment/Body
|distribution=Puerto Rico;Md.;Kans.;Okla.;N.Mex.;Tex.;La.;Calif.;Ala.;Oreg.;Ark.;Fla.;Miss.;Mo.;Ariz.;Colo.;Utah;Nev.
|discussion=<p>Echinochloa crus-pavonis is a native species found in scattered locations from British Columbia to Arizona, east to Florida, and south into South America. It favors marshes and wet places at lower elevations, often being found in the water.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Lower paleas more than 1/2 as long as the lemmas; panicles usually drooping
|[[Echinochloa crus var. crus-pavonis|Echinochloa crus var. crus-pavonis]]
|-id=key-0-1
|1
|Lower paleas absent or much less than 1/2 as long as the lemmas; panicles usually stiffly erect
|[[Echinochloa crus var. macera|Echinochloa crus var. macera]]
|}
</div></div><!--

-->{{#Taxon:
name=Echinochloa crus-pavonis
|authority=
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Poaceae
|illustrator=Linda A. Vorobik;Hana Pazdírková
|illustration copyright=Utah State University
|distribution=Puerto Rico;Md.;Kans.;Okla.;N.Mex.;Tex.;La.;Calif.;Ala.;Oreg.;Ark.;Fla.;Miss.;Mo.;Ariz.;Colo.;Utah;Nev.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25_1114.xml
|subfamily=Poaceae subfam. Panicoideae
|tribe=Poaceae tribe Paniceae
|genus=Echinochloa
|species=Echinochloa crus-pavonis
|2n chromosome quantity=36
|anther some measurement=0.5mm;0.7mm
|awn atypical some measurement=15
|awn course=curved
|awn some measurement=3mm;10mm
|blade length=12cm;60cm
|blade pubescence=glabrous
|blade width=10mm;25mm
|caryopsis length=1.2mm;1.5mm
|caryopsis width=1mm;1.3mm
|culm some measurement=30cm;150cm
|hair architecture=papillose-based;papillose-based
|internode pubescence=glabrous;glabrous
|ligule presence=absent
|lower floret reproduction=sterile
|lower lemma architecture or shape=awned
|lower palea development=well-developed
|lower palea presence=absent
|lower palea prominence=vestigial
|node pubescence=hispid;hispid;glabrous
|panicle orientation=drooping;erect
|panicle some measurement=10cm;30cm
|primary branch some measurement=0cm;14cm
|secondary branch some measurement=0cm;3cm
|sheath coloration=purplish
|sheath pubescence=glabrous
|spikelet architecture=disarticulating
|spikelet length=2.5mm;3.4mm
|spikelet width=1.2mm;1.4mm
|tip life cycle=early-withering
|tip variability=well-differentiated
|upper glume size=subequal
|upper lemma arrangement or shape=elliptic
|upper lemma pubescence=pubescent;glabrous
|upper lemma shape=obtuse;not acute
|whole-organism duration=perennial
|whole_organism duration=short-lived;annual
|whole_organism growth form=plant
}}<!--

-->[[Category:Treatment]][[Category:Echinochloa]]