View source for Polygonum aviculare subsp. aviculare

{{Treatment/ID
|accepted_name=Polygonum aviculare subsp. aviculare
|accepted_authority=
|publications=
|common_names=Common knotweed
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=I
|label=Introduced
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polygonum aviculare var. eximium
|authority=(Lindman) Ascherson & Graebner
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum aviculare subsp. heterophyllum
|authority=(Thiébaut-de-Berneaud ex Persoon) Arcangeli
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Polygonum aviculare subsp. monspeliense
|authority=
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Polygonum aviculare var. vegetum
|authority=Ledebour
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum heterophyllum
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Polygonum monspeliense
|authority=
|rank=species
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Polygonum;Polygonum aviculare;Polygonum aviculare subsp. aviculare
|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 aviculare]]</div><div class="higher-taxon"><small>subspecies</small>[[Polygonum aviculare subsp. aviculare]]</div></div>
|volume=Volume 5
|mention_page=page 558
|treatment_page=page 557
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>green, heterophyllous (often lacking larger proximal stem leaves at maturity). <b>Stems</b> 1–3, ascending or erect, sometimes decumbent, basal branches divaricate, (10–)25–75(–100) cm. <b>Leaves</b>: ocrea (5.5–)6–10(–14) mm, proximal part cylindric, distal part silvery, hyaline, soon lacerate and disintegrating into fibers; petiole 1–6(–8) mm; blade green, lateral veins visible but not raised abaxially, elliptic to oblanceolate, 18–50(–60) × (6–)10–20 mm, 2–4.5 times as long as wide, apex acute or obtuse; stem leaves 1.4–4 times as long as branch leaves. <b>Cymes</b> aggregated at tips of stems and branches, 3–8-flowered. <b>Pedicels</b> mostly exserted from ocreae, 2–5 mm. <b>Flowers</b>: perianth (2.3–)2.8–4.7(–5) mm, 1.8–2.8 times as long as wide; tube (15–)20–37% of perianth length; tepals overlapping, green with pink, red, or white margins, oblong, flat (cucullate in fruit), outer tepals not pouched at base; veins branched, thickened; stamens 7–8. <b>Achenes</b> enclosed in or barely exserted from perianth, brown to dark brown, ovate, 3-gonous, (2.1–)2.7–3.7 mm, faces subequal, concave, apex straight, striate-tubercled; late-season achenes uncommon, 3.5–5 mm. <b>2n</b> = 40, 60.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Oct.
|habitat=Fields, uncultivated areas, waste places, roadsides
|elevation=0-3500 m
|distribution=St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Ala.;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;La.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;Wyo.;Eurasia.
|introduced=true
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Polygonum aviculare subsp. aviculare
|authority=
|rank=subspecies
|parent rank=species
|synonyms=Polygonum aviculare var. eximium;Polygonum aviculare subsp. heterophyllum;Polygonum aviculare subsp. monspeliense;Polygonum aviculare var. vegetum;Polygonum heterophyllum;Polygonum monspeliense
|basionyms=
|family=Polygonaceae
|phenology=Flowering May–Oct.
|habitat=Fields, uncultivated areas, waste places, roadsides
|elevation=0-3500 m
|distribution=St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Ala.;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;La.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;Wyo.;Eurasia.
|introduced=true
|reference=None
|publication title=
|publication year=
|special status=Weedy;Introduced;Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_1137.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Polygonum
|species=Polygonum aviculare
|subspecies=Polygonum aviculare subsp. aviculare
}}<!--

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