View source for Muhlenbergia rigens

{{Treatment/ID
|accepted_name=Muhlenbergia rigens
|accepted_authority=(Benth.) Hitchc.
|publications=
|common_names=Deergrass
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Muhlenbergia mundula
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Muhlenbergia marshii
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Epicampes rigens
|authority=
|rank=species
}}
|hierarchy=Poaceae;Poaceae subfam. Chloridoideae;Poaceae tribe Cynodonteae;Muhlenbergia;Muhlenbergia rigens
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Chloridoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Cynodonteae]]</div><div class="higher-taxon"><small>genus</small>[[Muhlenbergia]]</div><div class="higher-taxon"><small>species</small>[[Muhlenbergia rigens]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 194
}}<!--

--><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>perennial;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism growth form;whole_organism architecture;whole_organism growth form">cespitose, not rhizomatous.</span> <span class="statement" id="st-d0_s2" data-properties="culm height;culm height;culm thickness;culm orientation;culm architecture"><b>Culms </b>(35) 50-150 cm tall, to 5 mm thick near the base, stiffly erect, not rooting at the lower nodes;</span> <span class="statement" id="st-d0_s3" data-properties="internode pubescence">internodes glabrous.</span> <span class="statement" id="st-d0_s4" data-properties="sheath length or size;sheath relief;sheath relief;sheath shape;base prominence or shape;base pubescence or texture"><b>Sheaths </b>longer than the internodes, smooth or scabridulous, rounded dorsally, bases somewhat flat and chartaceous;</span> <span class="statement" id="st-d0_s5" data-properties="ligule atypical some measurement;ligule some measurement;ligule texture;ligule architecture or shape;ligule pubescence">ligules 0.5-2 (3) mm, firm, truncate, usually ciliolate;</span> <span class="statement" id="st-d0_s6" data-properties="blade length;blade width;blade shape;blade shape;blade fragility;blade pubescence;blade pubescence or relief">blades 10-50 cm long, 1.5-6 mm wide, flat or involute, stiff, glabrous abaxially, scabrous adaxially.</span> <span class="statement" id="st-d0_s7" data-properties="panicle length;panicle width;panicle shape;panicle density;panicle coloration;panicle architecture"><b>Panicles </b>15-60 cm long, 0.5-1.2 cm wide, spikelike, dense, grayish-green, often interrupted below;</span> <span class="statement" id="st-d0_s8" data-properties="primary branch some measurement;primary branch fixation or orientation">primary branches 0.2-4 cm, appressed;</span> <span class="statement" id="st-d0_s9" data-properties="pedicel some measurement;pedicel pubescence;pedicel arrangement">pedicels 0.2-3 mm, hispidulous, strongly divergent.</span> <span class="statement" id="st-d0_s10" data-properties="spikelet some measurement"><b>Spikelets </b>2.4-4 mm.</span> <span class="statement" id="st-d0_s11" data-properties="glume size;glume some measurement;glume relief;glume architecture;glume shape;glume shape;glume shape;glume shape;glume shape;glume shape;glume shape;glume shape;glume shape;mucro some measurement"><b>Glumes </b>subequal, 1.8-3.2 mm, almost as long as the florets, scabrous to scabridulous, 1-veined, usually acute or obtuse, occasionally acuminate or notched, occasionally mucronate, mucros to 0.6 mm;</span> <span class="statement" id="st-d0_s12" data-properties="lemma some measurement;lemma shape;lemma pubescence;lemma position;lemma quantity;hair some measurement;apex pubescence or relief;apex shape;apex shape;apex shape;mucro some measurement">lemmas 2.4-4 mm, lanceolate, pubescent on the calluses, lower 1/6 of the margins, and midveins, hairs to 0.4 mm, apices scabrous, acute or obtuse, unawned, rarely mucronate, mucros to 1 mm;</span> <span class="statement" id="st-d0_s13" data-properties="palea some measurement;palea shape;palea shape">paleas 2.3-3.8 mm, lanceolate, acute;</span> <span class="statement" id="st-d0_s14" data-properties="anther some measurement;anther coloration">anthers 1.3-1.8 mm, yellow to purple.</span> <span class="statement" id="st-d0_s15" data-properties=""><b>Caryopses </b>1.8-2.2 mm, fusiform, brownish.</span> <span class="statement" id="st-d0_s16" data-properties="caryopsis some measurement;caryopsis shape;caryopsis coloration;2n chromosome quantity">2n = 40.</span><!--

-->{{Treatment/Body
|distribution=Calif.;Ariz.;N.Mex.;Nev.;Tex.
|discussion=<p>Muhlenbergia rigens grows in sandy washes, gravelly canyon bottoms, rocky drainages, and moist, sandy slopes, often along small streams, at elevations of 90-2500 m. Its geographic range extends to central Mexico. It is available commercially as an ornamental. Muhlenbergia rigens is similar to M. dubia, but differs in having tighter, spikelike panicles, shorter ligules, yellow or purplish anthers, and shorter lemmas.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Muhlenbergia rigens
|authority=(Benth.) Hitchc.
|rank=species
|parent rank=genus
|synonyms=Muhlenbergia mundula;Muhlenbergia marshii;Epicampes rigens
|basionyms=
|family=Poaceae
|illustrator=Linda A. Vorobik;Annaliese Miller
|illustration copyright=Utah State University
|distribution=Calif.;Ariz.;N.Mex.;Nev.;Tex.
|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_777.xml
|subfamily=Poaceae subfam. Chloridoideae
|tribe=Poaceae tribe Cynodonteae
|genus=Muhlenbergia
|species=Muhlenbergia rigens
|2n chromosome quantity=40
|anther coloration=yellow;purple
|anther some measurement=1.3mm;1.8mm
|apex pubescence or relief=scabrous
|apex shape=mucronate;obtuse;acute
|base prominence or shape=flat
|base pubescence or texture=chartaceous
|blade fragility=stiff
|blade length=10cm;50cm
|blade pubescence=glabrous
|blade pubescence or relief=scabrous
|blade shape=involute;flat
|blade width=1.5mm;6mm
|caryopsis coloration=brownish
|caryopsis shape=fusiform
|caryopsis some measurement=1.8mm;2.2mm
|culm architecture=not rooting
|culm height=50cm;150cm
|culm orientation=erect
|culm thickness=0mm;5mm
|glume architecture=1-veined
|glume relief=scabrous;scabridulous
|glume shape=mucronate;notched;acuminate;obtuse;acute;notched;acuminate;obtuse;acute
|glume size=subequal
|glume some measurement=1.8mm;3.2mm
|hair some measurement=0mm;0.4mm
|internode pubescence=glabrous
|lemma position=lower
|lemma pubescence=pubescent
|lemma quantity=1/6
|lemma shape=lanceolate
|lemma some measurement=2.4mm;4mm
|ligule architecture or shape=truncate
|ligule atypical some measurement=3
|ligule pubescence=ciliolate
|ligule some measurement=0.5mm;2mm
|ligule texture=firm
|mucro some measurement=0mm;1mm
|palea shape=acute;lanceolate
|palea some measurement=2.3mm;3.8mm
|panicle architecture=interrupted
|panicle coloration=grayish-green
|panicle density=dense
|panicle length=15cm;60cm
|panicle shape=spikelike
|panicle width=0.5cm;1.2cm
|pedicel arrangement=divergent
|pedicel pubescence=hispidulous
|pedicel some measurement=0.2mm;3mm
|primary branch fixation or orientation=appressed
|primary branch some measurement=0.2cm;4cm
|sheath length or size=longer
|sheath relief=scabridulous;smooth
|sheath shape=rounded
|spikelet some measurement=2.4mm;4mm
|whole_organism architecture=not rhizomatous
|whole_organism duration=perennial
|whole_organism growth form=plant;cespitose
}}<!--

-->[[Category:Treatment]][[Category:Muhlenbergia]]