View source for Polygonum fowleri subsp. hudsonianum

{{Treatment/ID
|accepted_name=Polygonum fowleri subsp. hudsonianum
|accepted_authority=(S. J. Wolf & McNeill) Costea & Tardif
|publications={{Treatment/Publication
|title=Sida
|place=20: 994. 2003
|year=2003
}}
|common_names=Hudsonian knotweed;renouée de la baie d’Hudson
|basionyms={{Treatment/ID/Basionym
|name=Polygonum caurianum subsp. hudsonianum
|authority=S. J. Wolf & McNeill
|rank=subspecies
|publication_title=Rhodora
|publication_place=88: 469, fig. 3. 1986
}}
|synonyms={{Treatment/ID/Synonym
|name=Polygonum hudsonianum
|authority=(S. J. Wolf & McNeill) H. R. Hinds
|rank=species
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Polygonum;Polygonum fowleri;Polygonum fowleri subsp. hudsonianum
|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. Polygonum]]</div><div class="higher-taxon"><small>species</small>[[Polygonum fowleri]]</div><div class="higher-taxon"><small>subspecies</small>[[Polygonum fowleri subsp. hudsonianum]]</div></div>
|volume=Volume 5
|mention_page=
|treatment_page=page 555
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>often purplish tinged, homophyllous, rarely subsucculent. <b>Stems</b> prostrate, 5–30 cm. <b>Leaves</b>: ocrea 2.5–5 mm; petiole 2–5 mm; blade purple tinged, narrowly obovate or oblanceolate, 8–30 × 4–12(–15) mm, apex rounded to obtuse; middle stem leaves 1.1–1.8(–2.2) times as long as adjacent branch leaves. <b>Cymes</b> 2–7(–10)-flowered. <b>Pedicels</b> 1–1.5 mm. <b>Perianths</b> (2.2–)2.5–3.3(–3.5) mm. <b>Achenes</b> ovate-lanceolate, (2–)3-gonous, (1.8–)2–2.5(–3.1) mm, faces often unequal, ± flat to concave, roughened, rarely obscurely tubercled.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Sep.
|habitat=Gravelly seashores
|elevation=0-30 m
|distribution=Man.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.
|discussion=<p>Wolf and McNeill described Hudsonian knotweed as a subspecies of <i>Polygonum</i> caurianum (<i>P. humifusum </i>subsp.<i> caurianum</i> in this treatment). In raising it to the rank of species, H. R. Hinds (1995) noted that “separation between <i>P. fowleri</i> and P. hudsonianum, however, is more difficult.” M. Costea and F. J. Tardif (2003) concluded that the taxon is best treated as a subspecies of <i>P. fowleri</i>, based on the existence of intermediate plants.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polygonum fowleri subsp. hudsonianum
|authority=(S. J. Wolf & McNeill) Costea & Tardif
|rank=subspecies
|parent rank=species
|synonyms=Polygonum hudsonianum
|basionyms=Polygonum caurianum subsp. hudsonianum
|family=Polygonaceae
|phenology=Flowering Jul–Sep.
|habitat=Gravelly seashores
|elevation=0-30 m
|distribution=Man.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.
|reference=None
|publication title=Sida
|publication year=2003
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_1132.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Polygonum
|species=Polygonum fowleri
|subspecies=Polygonum fowleri subsp. hudsonianum
}}<!--

-->[[Category:Treatment]][[Category:Polygonum fowleri]]