View source for Spirodela polyrrhiza

{{Treatment/ID
|accepted_name=Spirodela polyrrhiza
|accepted_authority=(Linnaeus) Schleiden
|publications={{Treatment/Publication
|title=Linnaea
|place=13: 392. 1839
|year=1839
}}
|common_names=Spirodèle polyrhize
|basionyms={{Treatment/ID/Basionym
|name=Lemna polyrrhiza
|authority=Linnaeus
|rank=species
|publication_title=Sp. Pl.
|publication_place=2: 970. 1753 (as polyrhiza)
}}
|synonyms=
|hierarchy=Lemnaceae;Spirodela;Spirodela polyrrhiza
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Lemnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Spirodela]]</div><div class="higher-taxon"><small>species</small>[[Spirodela polyrrhiza]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=page 145
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>7–21, to 3 cm, 1 or 2 perforating scale. <b>Fronds</b> obovate to circular, flat or rarely gibbous, 2–10 mm, 1–1.5 times as long as wide, apex rounded or pointed, upper surface sometimes with red spot in center; veins 7–16(–21); turions sometimes present, rootless, brownish olive, circular-reniform, 1–2 mm diam. <b>Flowers</b>: ovaries 1–2-ovulate. <b>Fruits</b> 1–1.5 mm, laterally winged to apex. <b>Seeds</b> with 12–20 distinct ribs. <b>2n</b> = 30, 38, 40, 50, 80.</span><!--

-->{{Treatment/Body
|phenology=Flowering (very rare) early summer–early fall.
|habitat=Eutrophic, quiet waters, in temperate to tropical regions
|elevation=0–2500 m
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;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.;Wis.;Wyo.;nearly worldwide.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Spirodela polyrrhiza
|authority=(Linnaeus) Schleiden
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Lemna polyrrhiza
|family=Lemnaceae
|phenology=Flowering (very rare) early summer–early fall.
|habitat=Eutrophic, quiet waters, in temperate to tropical regions
|elevation=0–2500 m
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;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.;Wis.;Wyo.;nearly worldwide.
|reference=None
|publication title=Linnaea
|publication year=1839
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_401.xml
|genus=Spirodela
|species=Spirodela polyrrhiza
}}<!--

-->[[Category:Treatment]][[Category:Spirodela]]