View source for Polygonum aviculare subsp. buxiforme

{{Treatment/ID
|accepted_name=Polygonum aviculare subsp. buxiforme
|accepted_authority=(Small) Costea & Tardif
|publications={{Treatment/Publication
|title=Sida
|place=20: 988. 2003
|year=2003
}}
|common_names=American knotweed;renouée faux-buis
|basionyms={{Treatment/ID/Synonym
|name=Polygonum buxiforme
|authority=Small
}}
|synonyms=
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Polygonum;Polygonum aviculare;Polygonum aviculare subsp. buxiforme
|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. buxiforme]]</div></div>
|volume=Volume 5
|mention_page=page 557
|treatment_page=page 558
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>gray-green or bluish green, rarely green, homophyllous or subheterophyllous. <b>Stems</b> 1–3, erect to ascending, ± unbranched, 5–15 cm, or numerous, procumbent, mat-forming, extensively branched, 20–70(–200) cm. <b>Leaves</b>: ocrea 3.5–6.5(–8) mm, proximal part cylindric, distal part silvery, relatively persistent, with inconspicuous veins, leaving almost no fibrous remains after disintegrating; petiole 0.3–2(–3.5) mm; blade green or gray-green, lateral veins visible but not raised abaxially, lanceolate to elliptic, oblanceolate, or obovate, 6–30(–45) × 3–6(–13) mm, 2.5–5.6(–10) times as long as wide, apex acute to obtuse; stem leaves 1–2.5 times as long as branch leaves. <b>Cymes</b> mostly uniformly distributed, but also aggregated at tips of stems and branches, 2–6-flowered. <b>Pedicels</b> mostly enclosed in ocreae, 1–2.5 mm. <b>Flowers</b>: perianth (2–)2.3–3.4(–3.6) mm, 0.9–1.3(–1.5) times as long as wide; tube 20–36% of perianth length; tepals overlapping, green with white or sometimes pink margins, oblong, apex cucullate, outer tepals pouched at base; veins branched, moderately to strongly thickened; stamens 7–8. <b>Achenes</b> usually enclosed in perianth, light brown to brown, ovate, 3-gonous, (1.8–)2–2.8(–3) mm, faces subequal, concave to flat, apex straight, coarsely striate-tubercled to obscurely tubercled; late-season achenes common, 2.5–5 mm. <b>2n</b> = 60.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Nov.
|habitat=Roadsides, vacant lots, sidewalks, packed and nondrifting sands, borders of marshes and dunes
|elevation=0-3500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Ont.;Que.;Sask.;Yukon;Ala.;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.
|discussion=<p>Although apparently it has a North American origin, subsp. buxiforme is considered part of the Polygonum aviculare complex because it intergrades with subsp. aviculare (M. Costea and F. J. Tardif 2003).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polygonum aviculare subsp. buxiforme
|author=
|authority=(Small) Costea & Tardif
|rank=subspecies
|parent rank=species
|synonyms=
|basionyms=Polygonum buxiforme
|family=Polygonaceae
|phenology=Flowering Jul–Nov.
|habitat=Roadsides, vacant lots, sidewalks, packed and nondrifting sands, borders of marshes and dunes
|elevation=0-3500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Ont.;Que.;Sask.;Yukon;Ala.;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.
|reference=None
|publication title=Sida
|publication year=2003
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V5/V5_1139.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Polygonum
|species=Polygonum aviculare
|subspecies=Polygonum aviculare subsp. buxiforme
}}<!--

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