View source for Pleuropogon

{{Treatment/ID
|accepted_name=Pleuropogon
|accepted_authority=R. Br.
|publications=
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Meliceae;Pleuropogon
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Pooideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Meliceae]]</div><div class="higher-taxon"><small>genus</small>[[Pleuropogon]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 103
}}<!--

--><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>annual or perennial;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism duration;whole_organism growth form;whole_organism architecture;whole_organism growth form">cespitose or rhizomatous.</span> <span class="statement" id="st-d0_s2" data-properties=""><b>Culms </b>5-160 cm, erect or geniculate at the base, glabrous;</span> <span class="statement" id="st-d0_s3" data-properties="culm some measurement;culm orientation;culm shape;culm pubescence;culm position;culm architecture;culm position">basal branching extravaginal.</span> <span class="statement" id="st-d0_s4" data-properties="sheath condition"><b>Sheaths </b>closed almost to the top;</span> <span class="statement" id="st-d0_s5" data-properties="ligule texture">ligules membranous;</span> <span class="statement" id="st-d0_s6" data-properties="blade shape;midrib prominence">blades flat to folded, adaxial surfaces with prominent midribs.</span> <span class="statement" id="st-d0_s7" data-properties="inflorescence position or structure subtype"><b>Inflorescences </b>terminal, racemes, rarely panicles.</span> <span class="statement" id="st-d0_s8" data-properties="spikelet shape;floret atypical quantity;floret quantity"><b>Spikelets </b>laterally compressed, with 5-20 (30) florets, upper florets reduced;</span> <span class="statement" id="st-d0_s9" data-properties="upper floret size">disarticulation above the glumes and beneath the florets.</span> <span class="statement" id="st-d0_s10" data-properties="glume size;glume height or length or size;glume texture;glume coloration or reflectance;lemma arrangement;margin texture"><b>Glumes </b>unequal to subequal, shorter than the adjacent lemmas, membranous to subhyaline, margins scarious;</span> <span class="statement" id="st-d0_s11" data-properties="lower glume architecture">lower glumes 1-veined;</span> <span class="statement" id="st-d0_s12" data-properties="upper glume architecture">upper glumes 1-3-veined;</span> <span class="statement" id="st-d0_s13" data-properties="rachilla internode architecture or function or pubescence;species shape;glandular portion coloration">rachilla internodes in some species swollen and glandular basally, the glandular portion turning whitish when dry;</span> <span class="statement" id="st-d0_s14" data-properties="callus shape;callus pubescence">calluses rounded, glabrous;</span> <span class="statement" id="st-d0_s15" data-properties="lemma width;lemma texture;lemma architecture;vein arrangement;margin texture;apex texture;apex architecture or shape;apex architecture or shape;midvein size;awn course">lemmas thick, herbaceous to membranous, 7 (9) -veined, veins parallel, margins scarious, apices scarious, entire or emarginate, midvein sometimes extended into an awn, awns straight;</span> <span class="statement" id="st-d0_s16" data-properties="palea size;palea architecture;palea shape;keel architecture;appendage quantity;appendage prominence or shape;appendage shape">paleas subequal to the lemmas, 2-veined, keeled over each vein, keels winged, with 1 or 2 awns or a flat triangular appendage;</span> <span class="statement" id="st-d0_s17" data-properties="lodicule quantity;lodicule fusion">lodicules 2, completely fused;</span> <span class="statement" id="st-d0_s18" data-properties="anther quantity">anthers 3, opening by pores;</span> <span class="statement" id="st-d0_s19" data-properties="ovary pubescence;x chromosome quantity;x chromosome quantity;x chromosome quantity">ovaries glabrous, x = 8, 9, 10.</span><!--

-->{{Treatment/Body
|distribution=B.C.;Greenland;Nfld. and Labr. (Nfld.);Nunavut;Ont.;Que.;Alaska;Calif.;Wash.;Oreg.
|discussion=<p>Pleuropogon is a genus of five hydrophilous species, one circumboreal in the arctic, the other four restricted to the Pacific coast of North America, extending from southern British Columbia to central California. The Pacific coast species are sometimes treated as a separate genus, Lophochlaena Nees, but are here regarded as constituting a subgenus of Pleuropogon.</p><!--
--><p>The flat, triangular paleal appendages differ from bristly or flattened awns in being wider at the base, and smooth rather than scabrous.</p>
|tables=
|references={{Treatment/Reference
|id=but1977a
|text=But, P.P.H. 1977. Systematics of Pleuropogon R. Br. (Poaceae). Ph.D. dissertation, University of California, Berkeley, California, U.S.A. 229 pp.
}}{{Treatment/Reference
|id=but1985b
|text=But, P.P.H., J. Kagan, V. Crosby, and J.S. Shelly. 1985. Rediscovery and reproductive biology of Pleuropogon oregonus (Poaceae). Madrono 32:189-190.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Paleal keels each with 2 awns, the lower awn 1-3 mm long, the upper awn 0.3-1 mm long: lemmas 3.5-5 mm long; plants of the arctic (subg. Pleuropogon)
|[[Pleuropogon sabinei|Pleuropogon sabinei]]
|-id=key-0-1
|1
|Paleal keels each with 1 awn 3-9 mm long, or a triangular appendage; lemmas 4.5-10 mm long; plants of the Pacific Northwest and California (subg. Lophochlaena).
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Lowest lemma in each spikelet 4.5-7.5 mm long; culms 15-95 cm tall; caryopses 2.5-3.1 mm long.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Paleal keels unawned, with a triangular appendage; rhizomes absent or poorly developed; rachilla internodes with a glandular swelling at the base
|[[Pleuropogon californicus|Pleuropogon californicus]]
|-id=key-0-3
|3
|Paleal keels with an awn 3-9 mm long, without a triangular appendage; rhizomes strongly developed; rachilla internodes without a glandular swelling at the base
|[[Pleuropogon oregonus|Pleuropogon oregonus]]
|-id=key-0-2
|2
|Lowest lemma in each spikelet 8-10 mm ong; culms mostly 100-160 cm tall; caryopses 3.5-6 mm long.
|[[#key-0-3| > 3]]
|-id=key-0-4
|4
|Lemma awns 0.2-4 mm long; pedicels usually erect, rarely reflexed, the spikelets erect or ascending at maturity
|[[Pleuropogon hooverianus|Pleuropogon hooverianus]]
|-id=key-0-4
|4
|Lemma awns (5)9-20 mm long; pedicels reflexed, the spikelets pendent at maturity
|[[Pleuropogon refractus|Pleuropogon refractus]]
|}
</div></div><!--

-->{{#Taxon:
name=Pleuropogon
|author=Paul P.H. But;
|authority=R. Br.
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Poaceae
|illustrator=Linda Ann Vorobik;Hana Pazdírková
|illustration copyright=Utah State University
|distribution=B.C.;Greenland;Nfld. and Labr. (Nfld.);Nunavut;Ont.;Que.;Alaska;Calif.;Wash.;Oreg.
|reference=but1977a;but1985b
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24_133.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Meliceae
|genus=Pleuropogon
|anther quantity=3
|apex architecture or shape=emarginate;entire
|apex texture=scarious
|appendage prominence or shape=flat
|appendage quantity=1
|appendage shape=triangular
|awn course=straight
|blade shape=flat;folded
|callus pubescence=glabrous
|callus shape=rounded
|culm architecture=branching
|culm orientation=erect
|culm position=extravaginal;basal
|culm pubescence=glabrous
|culm shape=geniculate
|culm some measurement=5cm;160cm
|floret atypical quantity=30
|floret quantity=5;20
|glandular portion coloration=whitish
|glume coloration or reflectance=subhyaline
|glume height or length or size=shorter
|glume size=unequal;subequal
|glume texture=membranous
|inflorescence position or structure subtype=terminal
|keel architecture=winged
|lemma architecture=7(9)-veined
|lemma arrangement=adjacent
|lemma texture=herbaceous;membranous
|lemma width=thick
|ligule texture=membranous
|lodicule fusion=fused
|lodicule quantity=2
|lower glume architecture=1-veined
|margin texture=scarious;scarious
|midrib prominence=prominent
|midvein size=extended
|ovary pubescence=glabrous
|palea architecture=2-veined
|palea shape=keeled
|palea size=subequal
|rachilla internode architecture or function or pubescence=glandular
|sheath condition=closed
|species shape=swollen
|spikelet shape=compressed
|upper floret size=reduced
|upper glume architecture=1-3-veined
|vein arrangement=parallel
|whole_organism architecture=rhizomatous
|whole_organism duration=perennial;annual
|whole_organism growth form=plant;cespitose
|x chromosome quantity=10;9;8
}}<!--

-->[[Category:Treatment]][[Category:Poaceae tribe Meliceae]]