View source for Dupontia fisheri

{{Treatment/ID
|accepted_name=Dupontia fisheri
|accepted_authority=R. Br.
|publications=
|common_names=Fisher's tundragrass;Dupontie de fisher
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Dupontia;Dupontia fisheri
|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 class="higher-taxon"><small>species</small>[[Dupontia fisheri]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 604
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Rhizomes </b>1-3 mm thick. <b>Culms</b> 5-80 cm, erect, glabrous. <b>Ligules</b> of lower leaves 0.4-3 mm; ligules of flag leaves 1-4(5.5) mm, usually lacerate; blades 1-13 cm long, 1-4 mm wide. <b>Panicles</b> 2.5-18 cm long, 1-6 cm wide. <b>Spikelets</b> 4-8.5(9) mm; rachilla internodes 1-1.5 mm. <b>Glumes</b> 4-8.5(9) mm; lemmas 3-6.5 mm; paleas 2.8-6 mm; anthers 1.5-3.5 mm. <b>Caryopses</b> 1.5-3 mm. <b>2n</b> = 42, 44, 66, 84, 88, about 105, about 126, 132.</span><!--

-->{{Treatment/Body
|distribution=Greenland;Nfld. and Labr. (Nfld.);Man.;N.W.T.;Nunavut;Ont.;Que.;Yukon;Alaska
|discussion=<p><i>Dupontia fisheri</i> grows in wet meadows, wet tundra, marshes, and along streams and the edges of lagoons, ponds, and lake shores, in sand, silt, clay, moss, and rarely in bogs.</p><!--
--><p>Two subspecies of <i>Dupontia</i> are sometimes recognized in North America. <i>Dupontia fisheri</i> R. Br. subsp. fisheri supposedly differs from subsp. psilosantha (Rupr.) Hulten in being shorter than 40 cm, having erect panicle branches, 2-4 florets per spikelet, pubescent, obtuse lemmas, and 2n= 84, 88, or 132. <i>Dupontia fisheri</i> subsp. psilosantha is taller, has reflexed panicle branches, 1-2 florets per spikelet, more or less glabrous, acute lemmas, and 2n =42 or 44. Plants referable to subsp. psilosantha are restricted to coastal marshes, rarely penetrating inland along riparian habitats, from James Bay to the lower arctic archipelago. Plants referable to subsp. fisheri are less halophytic and more northerly in their distribution, being found in a variety of inland marshes and wet tundra habitats from northern Alaska to Ellesmere Island. Intermediates are readily found (e.g., hexaploid, 2N = 66 "hybrids" from Alaska) and the correlations among chromosome number, morphology, ecology, and distribution are relatively weak in North America and Greenland. For these reasons, no subspecific taxa are recognized in this treatment. <i>Dupontia fisheri</i> hybridizes with <i>Poa eminens</i> to form ×Dupoa labradorica (p. 602). The hybrids differ from <i>D. fisheri</i> in having glumes that usually do not exceed the florets, and in having some woolly or crinkly callus hairs. The hybrid genus ×Arctodupontia is formed from <i>D. fisheri</i> and <i>Arctophila fulva</i>, and differs from <i>D. fisheri</i> in having lemmas with truncate, lacerate to dentate apices, rather than acute to acuminate apices.</p>
|tables=
|references=
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-->{{#Taxon:
name=Dupontia fisheri
|authority=R. Br.
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Poaceae
|illustrator=Linda Ann Vorobik;Hana Pazdírková
|illustration copyright=Utah State University
|distribution=Greenland;Nfld. and Labr. (Nfld.);Man.;N.W.T.;Nunavut;Ont.;Que.;Yukon;Alaska
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_852.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Poeae
|genus=Dupontia
|species=Dupontia fisheri
}}<!--

-->[[Category:Treatment]][[Category:Dupontia]]