View source for Persicaria hydropiperoides

{{Treatment/ID
|accepted_name=Persicaria hydropiperoides
|accepted_authority=(Michaux) Small
|publications={{Treatment/Publication
|title=Fl. S.E. U.S.,
|place=378. 1903
|year=1903
}}
|common_names=Swamp smartweed;renouée faux-poivre-d’eau
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Polygonum hydropiperoides
|authority=Michaux
|rank=species
|publication_title=Fl. Bor.-Amer.
|publication_place=1: 239. 1803
}}
|synonyms={{Treatment/ID/Synonym
|name=Persicaria opelousana
|authority=(Riddell ex Small) Small
|rank=species
}} {{Treatment/ID/Synonym
|name=Persicaria paludicola
|authority=Small
|rank=species
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. adenocalyx
|authority=(Stanford) Gleason
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. asperifolium
|authority=Stanford
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. breviciliatum
|authority=Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. bushianum
|authority=Stanford
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. digitatum
|authority=Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. opelousanum
|authority=(Riddell ex Small) W. Stone
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum hydropiperoides var. psilostachyum
|authority=H. St. John
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polygonum opelousanum
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Polygonum opelousanum var. adenocalyx
|authority=Stanford
|rank=variety
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Persicaria;Persicaria sect. Persicaria;Persicaria hydropiperoides
|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>[[Persicaria]]</div><div class="higher-taxon"><small>section</small>[[Persicaria sect. Persicaria]]</div><div class="higher-taxon"><small>species</small>[[Persicaria hydropiperoides]]</div></div>
|volume=Volume 5
|mention_page=page 574, 582, 583, 586, 587, 588
|treatment_page=page 585
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, 1.5–10 dm; roots also often arising from proximal nodes; rhizomes often present. <b>Stems</b> decumbent to ascending, usually branched, without noticeable ribs, glabrous or obscurely strigose distally. <b>Leaves</b>: ocrea brown, cylindric, 5–23 mm, chartaceous, base inflated, margins truncate, ciliate with bristles (2–)4–10 mm, surface glabrous or strigose, not glandular-punctate; petiole 0.2–2 cm, glabrous or strigose; blade without dark triangular or lunate blotch adaxially, broadly lanceolate to linear-lanceolate, 5–25 × 0.4–3.7 cm, base tapered or acute, margins antrorsely appressed-pubescent, apex acuminate, faces glabrous or appressed-pubescent along midveins and sometimes on faces, usually punctate abaxially. <b>Inflorescences</b> terminal, sometimes also axillary, erect, uninterrupted or interrupted proximally, 30–80 × 2–5 mm; peduncle 10–30 mm, glabrous or strigose; ocreolae overlapping distally, often not overlapping proximally, margins ciliate with bristles to 2(–3) mm. <b>Pedicels</b> ascending, 1–1.5 mm. <b>Flowers</b> bisexual or unisexual and staminate, 2–6 per ocreate fascicle, homostylous; perianth roseate proximally, roseate, white, or greenish white distally, not glandular-punctate or sometimes glandular-punctate with punctae on tubes and inner tepals, scarcely accrescent; tepals 5, connate ca. 1/3–1/2 their length, obovate, 2.5–4 mm in bisexual flowers, 1.5–2.5 mm in staminate flowers, veins prominent or not, not anchor-shaped, margins entire, apex obtuse to rounded; stamens 8, included or exserted in staminate flowers; anthers pink or red, elliptic to ovate; styles 3, connate near middle. <b>Achenes</b> included or apex exserted, brown to brownish black or black, 3-gonous, 1.5–3 × 1–2.3 mm, shiny, smooth.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Nov.
|habitat=Wet banks and clearings, shallow water, marshes, moist prairies, ditches
|elevation=0-1500 m
|distribution=B.C.;N.B.;N.S.;Ont.;Que.;Ala.;Alaska;Ariz.;Ark.;Calif.;Conn.;Del.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Vt.;Va.;Wash.;W.Va.;Wis.;Mexico;Central America;South America.
|discussion=<p>The extreme variability in <i>Persicaria hydropiperoides</i> is reflected in its extensive synonymy. Among the segregates most often recognized in floras and checklists is P. opelousana, which C. B. McDonald (1980) showed to be broadly sympatric and highly interfertile with <i>P. hydropiperoides</i>. Consistent with this conclusion, R. S. Mitchell (1971) found that <i>P. hydropiperoides</i> and P. opelousana are unique among native North American smartweeds in consistently possessing multicellular plate-glands on the abaxial surface of their leaves. Such glands also are found on <i>P. maculosa</i>, an introduced European species.</p><!--
--><p>Herbarium specimens of <i>Persicaria hydropiperoides</i> sometimes are misidentified as <i>P. maculosa</i>, especially when the roots are missing. The former species may be distinguished reliably by its achenes all trigonous (trigonous and biconvex achenes are mixed in the inflorescences of <i>P. maculosa</i>) and bristles on the margins of the ocreae that average longer. M. L. Fernald (1922c) reported hybrids with <i>P. robustior</i> from Nova Scotia.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Persicaria hydropiperoides
|authority=(Michaux) Small
|rank=species
|parent rank=section
|synonyms=Persicaria opelousana;Persicaria paludicola;Polygonum hydropiperoides var. adenocalyx;Polygonum hydropiperoides var. asperifolium;Polygonum hydropiperoides var. breviciliatum;Polygonum hydropiperoides var. bushianum;Polygonum hydropiperoides var. digitatum;Polygonum hydropiperoides var. opelousanum;Polygonum hydropiperoides var. psilostachyum;Polygonum opelousanum;Polygonum opelousanum var. adenocalyx
|basionyms=Polygonum hydropiperoides
|family=Polygonaceae
|phenology=Flowering Jun–Nov.
|habitat=Wet banks and clearings, shallow water, marshes, moist prairies, ditches
|elevation=0-1500 m
|distribution=B.C.;N.B.;N.S.;Ont.;Que.;Ala.;Alaska;Ariz.;Ark.;Calif.;Conn.;Del.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Vt.;Va.;Wash.;W.Va.;Wis.;Mexico;Central America;South America.
|reference=None
|publication title=Fl. S.E. U.S.,
|publication year=1903
|special status=Weedy;Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_1195.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Persicaria
|section=Persicaria sect. Persicaria
|species=Persicaria hydropiperoides
}}<!--

-->[[Category:Treatment]][[Category:Persicaria sect. Persicaria]]