View source for Polygonum aviculare subsp. neglectum

{{Treatment/ID
|accepted_name=Polygonum aviculare subsp. neglectum
|accepted_authority=(Besser) Arcangeli
|publications={{Treatment/Publication
|title=Comp. Fl. Ital.,
|place=583. 1882
|year=1882
}}
|common_names=Narrow-leaf knotweed;renouée négligée
|basionyms={{Treatment/ID/Basionym
|name=Polygonum neglectum
|authority=Besser
|publication_title=Enum. Pl.,
|publication_place=45. 1822
}}
|synonyms={{Treatment/ID/Synonym
|name=Polygonum aequale subsp. oedocarpum
|authority=Lindman
}} {{Treatment/ID/Synonym
|name=Polygonum aviculare subsp. rectum
|authority=Chrtek
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Polygonum;Polygonum aviculare;Polygonum aviculare subsp. neglectum
|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. neglectum]]</div></div>
|volume=Volume 5
|mention_page=page 556, 557
|treatment_page=page 558
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>green, homophyllous or sometimes heterophyllous. <b>Stems</b> usually 1–7, procumbent to ascending, sometimes erect, mostly branched from base, (5–)15–60 cm. <b>Leaves</b>: ocrea (3–)4–8 mm, proximal part cylindric, distal part with inconspicuous veins, eventually disintegrating and leaving few or no fibrous remains; petiole (0.3–)1–3(–5.2) mm; blade green, lateral veins visible but not raised abaxially, narrowly elliptic or oblanceolate, (7.6–)12.2–34(–40) × 1.5–6.8(–8) mm, (3.4–)4.2–9.2 times as long as wide, apex acute or obtuse; stem leaves 1–2.7(–3.3) times as long as branch leaves. <b>Cymes</b> uniformly distributed along stems and branches, 1–3(–5)-flowered. <b>Pedicels</b> mostly enclosed in ocreae, 1.5–3 mm. <b>Flowers</b>: perianth (1.9–)2.3–3.4 mm, 1.6–2.6 times as long as wide; tube 28–48% of perianth length; tepals overlapping, spreading slightly as achene matures, green usually with pink or red, rarely white, margins, oblong, ± cucullate, outer tepals not pouched at base; veins branched, moderately to strongly thickened; stamens 7–8. <b>Achenes</b> exserted from perianth, dark brown, ovate, 3-gonous, 1.2–1.8 mm, faces unequal or, less often, subequal, flat to concave, apex with straight edges or somewhat bent toward narrow face, striate-tubercled or, rarely, obscurely so; late-season achenes uncommon, 2–3.7 mm. <b>2n</b> = 40, 60.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Nov.
|habitat=Disturbed places
|elevation=0-1500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Alaska;Ariz.;Ark.;Calif.;Conn.;Ga.;Ill.;Ind.;Kans.;Ky.;La.;Maine;Md.;Mass.;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.;Wyo.;Europe.
|discussion=<p>Subspecies neglectum has been reported from Colorado, Idaho, Iowa, and Wisconsin; those reports have not been confirmed.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Polygonum aviculare subsp. neglectum
|author=
|authority=(Besser) Arcangeli
|rank=subspecies
|parent rank=species
|synonyms=Polygonum aequale subsp. oedocarpum;Polygonum aviculare subsp. rectum
|basionyms=Polygonum neglectum
|family=Polygonaceae
|phenology=Flowering Jun–Nov.
|habitat=Disturbed places
|elevation=0-1500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Alaska;Ariz.;Ark.;Calif.;Conn.;Ga.;Ill.;Ind.;Kans.;Ky.;La.;Maine;Md.;Mass.;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.;Wyo.;Europe.
|introduced=true
|reference=None
|publication title=Comp. Fl. Ital.,
|publication year=1882
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V5/V5_1140.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Polygonum
|species=Polygonum aviculare
|subspecies=Polygonum aviculare subsp. neglectum
}}<!--

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