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
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|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-d0_s0" data-properties="whole_organism coloration;whole_organism architecture;whole_organism growth form"><b>Plants </b>often purplish tinged, homophyllous, rarely subsucculent.</span> <span class="statement" id="st-d0_s1" data-properties="stem growth form or orientation;stem some measurement"><b>Stems </b>prostrate, 5–30 cm.</span> <span class="statement" id="st-d0_s2" data-properties="ocreum some measurement"><b>Leaves:</b> ocrea 2.5–5 mm;</span> <span class="statement" id="st-d0_s3" data-properties="petiole some measurement">petiole 2–5 mm;</span> <span class="statement" id="st-d0_s4" data-properties="blade coloration;blade shape;blade shape;blade length;blade atypical width;blade width;apex shape">blade purple-tinged, narrowly obovate or oblanceolate, 8–30 × 4–12 (–15) mm, apex rounded to obtuse;</span> <span class="statement" id="st-d0_s5" data-properties="middle stem-leaf length">middle stem-leaves 1.1–1.8 (–2.2) times as long as adjacent branch leaves.</span> <span class="statement" id="st-d0_s6" data-properties="cyme architecture"><b>Cymes </b>2–7 (–10) -flowered.</span> <span class="statement" id="st-d0_s7" data-properties="pedicel some measurement"><b>Pedicels </b>1–1.5 mm.</span> <span class="statement" id="st-d0_s8" data-properties="perianth atypical some measurement;perianth atypical some measurement;perianth some measurement"><b>Perianths </b>(2.2–) 2.5–3.3 (–3.5) mm.</span> <span class="statement" id="st-d0_s9" data-properties="achene shape;achene shape;achene atypical some measurement;achene atypical some measurement;achene some measurement;face size;face shape;face relief or texture;face architecture"><b>Achenes </b>ovatelanceolate, (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 Polygonum caurianum (P. humifusum subsp. caurianum in this treatment). In raising it to the rank of species, H. R. Hinds (1995) noted that “separation between P. fowleri 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 P. fowleri, 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=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V5/V5_1132.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Polygonum
|species=Polygonum fowleri
|subspecies=Polygonum fowleri subsp. hudsonianum
|achene atypical some measurement=2.5mm;3.1mm
|achene shape=(2-)3-gonous;ovatelanceolate
|achene some measurement=2mm;2.5mm
|apex shape=rounded;obtuse
|blade atypical width=12mm;15mm
|blade coloration=purple-tinged
|blade length=8mm;30mm
|blade shape=oblanceolate;obovate
|blade width=4mm;12mm
|cyme architecture=2-7(-10)-flowered
|face architecture=tubercled
|face relief or texture=roughened
|face shape=less flat;concave
|face size=unequal
|middle stem-leaf length=1.1-1.8(-2.2) times as long as adjacent branch leaves
|ocreum some measurement=2.5mm;5mm
|pedicel some measurement=1mm;1.5mm
|perianth atypical some measurement=3.3mm;3.5mm
|perianth some measurement=2.5mm;3.3mm
|petiole some measurement=2mm;5mm
|stem growth form or orientation=prostrate
|stem some measurement=5cm;30cm
|whole_organism architecture=homophyllous
|whole_organism coloration=purplish tinged
|whole_organism growth form=plant
}}<!--

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