View source for Dupontia ← Dupontia You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Dupontia |accepted_authority=R. Br. |publications= |basionyms= |synonyms= |hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Dupontia |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 Poeae]]</div><div class="higher-taxon"><small>genus</small>[[Dupontia]]</div></div> |volume=Volume 24 |mention_page= |treatment_page=page 602 }}<!-- --><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 architecture;whole_organism growth form">rhizomatous.</span> <span class="statement" id="st-d0_s2" data-properties="culm some measurement"><b>Culms </b>5-80 cm.</span> <span class="statement" id="st-d0_s3" data-properties="sheath length;sheath pubescence"><b>Sheaths </b>closed for 1/2 - 2/3 their length, glabrous;</span> <span class="statement" id="st-d0_s4" data-properties="auricle presence">auricles absent;</span> <span class="statement" id="st-d0_s5" data-properties="ligule texture;ligule pubescence;ligule architecture or shape">ligules membranous, glabrous, truncate;</span> <span class="statement" id="st-d0_s6" data-properties="blade shape;blade shape;blade pubescence;adaxial surface pubescence;adaxial surface pubescence">blades flat or folded, usually glabrous, adaxial surfaces sometimes scabrous or shortly pubescent.</span> <span class="statement" id="st-d0_s7" data-properties="inflorescences panicle density;inflorescences panicle shape;spikelet quantity"><b>Inflorescences </b>panicles, diffuse to dense and spikelike, with few spikelets;</span> <span class="statement" id="st-d0_s8" data-properties="branch atypical some measurement;branch some measurement;branch architecture or pubescence or relief;branch fragility;branch orientation;secondary branch fixation or orientation">branches 0.7-3.5 (8.5) cm, smooth, stiff, erect to reflexed, secondary branches usually appressed.</span> <span class="statement" id="st-d0_s9" data-properties="spikelet architecture;spikelet shape;floret atypical quantity;floret quantity;distal floret reproduction"><b>Spikelets </b>pedicellate, slightly laterally compressed, with 1-4 (5) florets, distal florets sterile;</span> <span class="statement" id="st-d0_s10" data-properties="floret prominence">rachillas prolonged beyond the uppermost floret or terminating in a vestigial floret, glabrous;</span> <span class="statement" id="st-d0_s11" data-properties="rachilla length;rachilla pubescence;floret reproduction">disarticulation above the glumes and beneath the fertile florets.</span> <span class="statement" id="st-d0_s12" data-properties="glume size;glume variability;glume variability;glume shape;glume shape;glume texture;glume pubescence;glume architecture"><b>Glumes </b>subequal, equaling or usually exceeding the distal florets, ovate and obtuse to lanceolate-attenuate, membranous, glabrous, 1-3-veined, unawned;</span> <span class="statement" id="st-d0_s13" data-properties="callus height or length or size;callus shape;hair fragility">calluses short, blunt, with a ring of stiff hairs, hairs to about 1 mm;</span> <span class="statement" id="st-d0_s14" data-properties="lemma shape;lemma texture;lemma pubescence;lemma pubescence;vein quantity;vein atypical quantity;vein width;apex shape;midvein architecture;awn atypical some measurement;awn some measurement">lemmas ovate to ovatelanceolate, membranous to coriaceous, glabrous or pubescent, with 3 (5) fine veins, apices acute to acuminate, midveins sometimes excurrent as a mucro or awn to 1 (2.2) mm;</span> <span class="statement" id="st-d0_s15" data-properties="palea height or length or size;palea pubescence;palea pubescence or relief">paleas shorter than the lemmas, glabrous, sometimes scabrous on the veins;</span> <span class="statement" id="st-d0_s16" data-properties="lodicule quantity;lodicule texture;lodicule pubescence">lodicules 2, membranous, glabrous;</span> <span class="statement" id="st-d0_s17" data-properties="anther quantity">anthers 3;</span> <span class="statement" id="st-d0_s18" data-properties="ovary pubescence">ovaries glabrous.</span> <span class="statement" id="st-d0_s19" data-properties="caryopse height or length or size;caryopse prominence;caryopse life cycle;caryopse fusion"><b>Caryopses </b>shorter than the lemmas, concealed at maturity, falling free of the lemma and palea;</span> <span class="statement" id="st-d0_s20" data-properties="hilum quantity;hilum length;x chromosome quantity;x chromosome quantity">hila 1/6 – 1/3 the length of the caryopses, ovate, x = not clear, 7 or 11.</span><!-- -->{{Treatment/Body |distribution=Greenland;Nfld. and Labr. (Nfld.);Man.;N.W.T.;Nunavut;Ont.;Que.;Yukon;Alaska |discussion=<p>Dupontia is a monotypic genus of arctic and subarctic wetlands, found throughout the holarctic region except in Scandinavia. Hybrids with Arctophila are referred to xArctodupontia (see next); hybrids with Poa eminens are referred to xDupoa (see previous).</p> |tables= |references={{Treatment/Reference |id=brysting2003a |text=Brysting, A.K., S.G. Aiken, L.P. Lefkovitch, and R.L. Boles. 2003. Dupontia (Poaceae) in North America. Canad. J. Bot. 81:769-779 }}{{Treatment/Reference |id=brysting2004a |text=Brysting, A.K., M.F. Fay, I.J. Leitch, and S.G. Aiken. 2004. One or more species in the arctic grass genus Dupontia?—A contribution to the Panarctic Flora project. Taxon 53:365-382 }}{{Treatment/Reference |id=jurtsev1995a |text=Jurtsev, B.A. 1995. Dupontia. Pp. 224-229 in J.G. Packer (ed., English edition). Flora of the Russian Arctic, vol. 1, trans. G.C.D. Griffiths. University of Alberta Press, Edmonton, Alberta, Canada. 330 pp. [English translation of A.I. Tolmachev (ed.). 1964. Arkticheskaya Flora SSSR, vol. 2. Nauka, Leningrad [St. Petersburg], Russia. 272 pp.]. }} }}<!-- --><!-- -->{{#Taxon: name=Dupontia |author=Jacques Cayouette;Stephen J. Darbyshire; |authority=R. Br. |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Poaceae |distribution=Greenland;Nfld. and Labr. (Nfld.);Man.;N.W.T.;Nunavut;Ont.;Que.;Yukon;Alaska |reference=brysting2003a;brysting2004a;jurtsev1995a |publication title= |publication year= |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24_851.xml |subfamily=Poaceae subfam. Pooideae |tribe=Poaceae tribe Poeae |genus=Dupontia |adaxial surface pubescence=pubescent;scabrous |anther quantity=3 |apex shape=acute;acuminate |auricle presence=absent |awn atypical some measurement=2.2 |awn some measurement=0mm;1mm |blade pubescence=glabrous |blade shape=folded;flat |branch architecture or pubescence or relief=smooth |branch atypical some measurement=8.5 |branch fragility=stiff |branch orientation=erect;reflexed |branch some measurement=0.7cm;3.5cm |callus height or length or size=short |callus shape=blunt |caryopse fusion=free |caryopse height or length or size=shorter |caryopse life cycle=falling |caryopse prominence=concealed |culm some measurement=5cm;80cm |distal floret reproduction=sterile |floret atypical quantity=5 |floret prominence=vestigial |floret quantity=1;4 |floret reproduction=fertile |glume architecture=1-3-veined |glume pubescence=glabrous |glume shape=obtuse;lanceolate-attenuate |glume size=subequal |glume texture=membranous |glume variability=usually exceeding the distal florets;equaling |hair fragility=stiff |hilum length=ovate |hilum quantity=1/6;1/3 |inflorescences panicle density=diffuse;dense |inflorescences panicle shape=spikelike |lemma pubescence=pubescent;glabrous |lemma shape=ovate;ovatelanceolate |lemma texture=membranous;coriaceous |ligule architecture or shape=truncate |ligule pubescence=glabrous |ligule texture=membranous |lodicule pubescence=glabrous |lodicule quantity=2 |lodicule texture=membranous |midvein architecture=excurrent |ovary pubescence=glabrous |palea height or length or size=shorter |palea pubescence=glabrous |palea pubescence or relief=scabrous |rachilla length=prolonged |rachilla pubescence=glabrous |secondary branch fixation or orientation=appressed |sheath length=closed |sheath pubescence=glabrous |spikelet architecture=pedicellate |spikelet quantity=few |spikelet shape=compressed |vein atypical quantity=5 |vein quantity=3 |vein width=fine |whole_organism architecture=rhizomatous |whole_organism duration=perennial |whole_organism growth form=plant |x chromosome quantity=11;7 }}<!-- -->[[Category:Treatment]][[Category:Poaceae tribe Poeae]] Templates used on this page: Template:Poaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Reference (view source) Return to Dupontia.