View source for Polygonum utahense

{{Treatment/ID
|accepted_name=Polygonum utahense
|accepted_authority=Brenckle & Cottam
|publications={{Treatment/Publication
|title=Bull. Univ. Utah, Biol. Ser.
|place=4(4): 3, plate 1. 1940
|year=1940
}}
|common_names=Utah knotweed
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polygonum douglasii var. utahense
|authority=(Brenckle & Cottam) S. L. Welsh
|rank=variety
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Duravia;Polygonum utahense
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Polygonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Polygonum]]</div><div class="higher-taxon"><small>section</small>[[Polygonum sect. Duravia]]</div><div class="higher-taxon"><small>species</small>[[Polygonum utahense]]</div></div>
|volume=Volume 5
|mention_page=page 561, 562
|treatment_page=page 571
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs.</b> Stems erect, green, simple or with few branches, not wiry, 1.5–3.5 cm, papillose-scabridulous. <b>Leaves</b> uniformly distributed, articulated to ocreae, basal leaves persistent, distal leaves abruptly reduced to bracts; ocrea 2–3.5 mm, papillose-scabridulous, proximal part funnelform, distal part hyaline, lacerate; petiole absent; blade 1-veined, not pleated, linear-subulate, 6–14 × 1 mm, coriaceous, margins revolute, touching along midrib, apex acute, mucronate, papillose. <b>Inflorescences</b> axillary and terminal, spikelike, dense; cymes overlapping, starting almost from stem base, 2–4-flowered. <b>Pedicels</b> enclosed in ocreae, erect to spreading, 0.4–1 mm. <b>Flowers</b> open; perianth 2–2.5 mm; tube 20–25% of perianth length; tepals overlapping, uniformly white, petaloid, oblong to widely obovate, cucullate, navicular in distal 1/4, apex rounded; midveins branched; stamens 8. <b>Achenes</b> enclosed in perianth, black, elliptic, 1.5–2 mm, faces subequal, shiny, smooth.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Sep.
|habitat=Dry, sandy ravines, rocky Navajo sandstone spur
|elevation=2300 m
|distribution=Utah.
|discussion=<p><i>Polygonum utahense</i> has been treated as a synonym of <i>P. sawatchense</i> by some authors (e.g., S. L. Welsh et al. 1987; J. T. Kartesz and C. A. Meacham 1999). Its perianth morphology suggests a relationship with <i>P. cascadense</i>, from which it differs in its dwarf habit and uniformly papillose leaves with margins revolute, touching along midribs.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polygonum utahense
|authority=Brenckle & Cottam
|rank=species
|parent rank=section
|synonyms=Polygonum douglasii var. utahense
|basionyms=
|family=Polygonaceae
|phenology=Flowering Jul–Sep.
|habitat=Dry, sandy ravines, rocky Navajo sandstone spur
|elevation=2300 m
|distribution=Utah.
|reference=None
|publication title=Bull. Univ. Utah, Biol. Ser.
|publication year=1940
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V5/V5_1171.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Duravia
|species=Polygonum utahense
}}<!--

-->[[Category:Treatment]][[Category:Polygonum sect. Duravia]]