View source for Panicum amarum

{{Treatment/ID
|accepted_name=Panicum amarum
|accepted_authority=Elliott
|publications=
|common_names=Bitter beachgrass
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Paniceae;Panicum;Panicum subg. Panicum;Panicum sect. Repentia;Panicum amarum
|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>[[Panicum]]</div><div class="higher-taxon"><small>subgenus</small>[[Panicum subg. Panicum]]</div><div class="higher-taxon"><small>section</small>[[Panicum sect. Repentia]]</div><div class="higher-taxon"><small>species</small>[[Panicum amarum]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 472
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial; rhizomatous, rhizomes stout, glabrous and glaucous throughout. <b>Culms</b> 20-250 cm tall, 3-10 mm thick, erect or decumbent, simple or branched from the lower nodes; nodes glabrous; internodes glabrous, glaucous. <b>Sheaths</b> shorter or longer than the internodes, not keeled, glabrous; collars often glaucous and purplish; ligules 1-5 mm; blades 7-50 cm long, 2-13 mm wide, erect or ascending, firm, thick, flat basally, more or less involute towards the apices. <b>Panicles</b> 10-80 cm long, 2-17 cm wide, contracted, slightly nodding; primary branches whorled or opposite, strongly ascending to appressed; pedicels 0.5-15 mm, appressed to slightly divergent. <b>Spikelets</b> 4-7.7 mm long, 1.5-2 mm wide, narrowly ovoid, glabrous, acuminate; lower florets staminate. <b>Glumes</b> and lower lemmas relatively thick; lower glumes 2.8-4 mm, 1/2 - 4/5 as long as the spikelets, 3-9-veined, apices of the midveins sometimes scabridulous; upper glumes and lower lemmas extending 1.5-3 mm beyond the upper florets, apices stiffly gaping; upper glumes 3.9-7.6 mm, 5-9-veined; lower lemmas slightly shorter than the upper glumes, 7-9-veined, lower paleas 3-7 mm, oblong-hastate, folded over the anthers; lower florets staminate; upper florets 2.4-3.9 mm long, 1-1.8 mm wide, narrowly ovoid to oblong, glabrous, smooth, shiny, lemma margins clasping the paleas only at the base. <b>2n</b> = 36, 54.</span><!--

-->{{Treatment/Body
|distribution=Conn.;N.J.;N.Y.;Del.;Fla.;La.;Md.;Miss.;N.C.;Tex.;Va.;W.Va.;Ala.;N.Mex.;Pa.;R.I.;Ga.;Mass.;S.C.
|discussion=<p><i>Panicum amarum</i> grows in the coastal dunes, wet sandy soils, and the margins of swamps, along the Atlantic Ocean and the Gulf of Mexico from Connecticut to northeastern Mexico. It is also known, as an introduction, from a few inland locations in New Mexico, North Carolina, and West Virginia, as well as in the Bahamas and Cuba.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Rhizomes short or ascending; culms often bunched and decumbent, usually more than 120 cm tall; lower glumes with 3-5 less evident veins, the midvein smooth distally; spikelet density high; panicles with 2 or more main branches per node; spikelets 4-5.9 mm long
|[[Panicum amarum subsp. amarulum|Panicum amarum subsp. amarulum]]
|-id=key-0-1
|1
|Rhizomes horizontally elongate; culms mostly solitary, less than 150 cm tall; lower glumes with 7-9 prominent veins, the midvein scabridulous distally; spikelet density moderate; panicles with 1 or 2 main branches per node; spikelets 4.7-7.7 mm long
|[[Panicum amarum subsp. amarum|Panicum amarum subsp. amarum]]
|}
</div></div><!--

-->{{#Taxon:
name=Panicum amarum
|author=
|authority=Elliott
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Poaceae
|distribution=Conn.;N.J.;N.Y.;Del.;Fla.;La.;Md.;Miss.;N.C.;Tex.;Va.;W.Va.;Ala.;N.Mex.;Pa.;R.I.;Ga.;Mass.;S.C.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V25/V25_1263.xml
|subfamily=Poaceae subfam. Panicoideae
|tribe=Poaceae tribe Paniceae
|genus=Panicum
|subgenus=Panicum subg. Panicum
|section=Panicum sect. Repentia
|species=Panicum amarum
}}<!--

-->[[Category:Treatment]][[Category:Panicum sect. Repentia]]