View source for Callitriche heterophylla

{{Treatment/ID
|accepted_name=Callitriche heterophylla
|accepted_authority=Pursh
|publications={{Treatment/Publication
|title=Fl. Amer. Sept.
|place=1: 3. 1813
|year=1813
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Callitriche anceps
|authority=Fernald
|rank=species
}} {{Treatment/ID/Synonym
|name=C. bolanderi
|authority=Hegelmaier
|rank=species
}} {{Treatment/ID/Synonym
|name=C. deflexa var. austinii
|authority=(Engelmann) Hegelmaier
|rank=variety
}} {{Treatment/ID/Synonym
|name=C. heterophylla subsp. bolanderi
|authority=(Hegelmaier) Calder & Roy L. Taylor
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=C. heterophylla var. bolanderi
|authority=(Hegelmaier) Fassett
|rank=variety
}}
|hierarchy=Plantaginaceae;Callitriche;Callitriche heterophylla
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Plantaginaceae]]</div><div class="higher-taxon"><small>genus</small>[[Callitriche]]</div><div class="higher-taxon"><small>species</small>[[Callitriche heterophylla]]</div></div>
|volume=Volume 17
|mention_page=page 49, 50, 52
|treatment_page=page 51
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Leaves </b>connate at base, ± linear, tapering from near base or spatulate, 3.7–24.7 × 0.3–3.5 mm, 1+-veined. <b>Stem</b> and leaf scales present. <b>Inflorescences</b>: bracts caducous. <b>Pedicels</b> 0 mm in fruit. <b>Flowers</b> usually solitary; styles erect or spreading; pollen yellow. <b>Schizocarps</b> ± round, (0.4–)0.5–0.9(–1.2) × 0.5–1(–1.2) mm, as long as wide; mericarps black, not swollen, not winged or winged only at apex, wings straight, 0.05–0.1 mm wide.</span><!--

-->{{Treatment/Body
|phenology=Flowering Feb–Nov.
|habitat=Fast-flowing streams, backwaters, ditches, swamps, Sphagnum bogs, lakes, ponds, springs, seepages, seasonally damp soils in shade.
|elevation=0–3000 m.
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Yukon;Ala.;Alaska;Ariz.;Ark.;Calif.;Conn.;Del.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Miss.;Mo.;Mont.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;Wash.;Wis.;Mexico;West Indies (Antilles);Central America;South America;introduced in Pacific Islands (New Zealand).
|discussion=<p>Two varieties have been recognized in <i>Callitriche heterophylla</i>, with <i></i>var.<i> bolanderi</i> distinguished on the basis of its schizocarps being larger (for example, N. C. Fassett 1951b); however, the size of the schizocarps overlaps widely, and measurements of schizocarps from throughout North America show that there is no clear geographical or ecological separation between plants with smaller fruit and those with larger fruit. Therefore, there is no justification for maintaining the distinction.</p><!--
--><p>Populations of small plants with linear leaves from parts of Canada and Alaska have been separated as <i>Callitriche</i> anceps. However, these appear to represent the lower extremes of variation in <i>C. heterophylla</i>, and morphological characters do not justify maintaining the distinction.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Callitriche heterophylla
|authority=Pursh
|rank=species
|parent rank=genus
|synonyms=Callitriche anceps;C. bolanderi;C. deflexa var. austinii;C. heterophylla subsp. bolanderi;C. heterophylla var. bolanderi
|basionyms=
|family=Plantaginaceae
|phenology=Flowering Feb–Nov.
|habitat=Fast-flowing streams, backwaters, ditches, swamps, Sphagnum bogs, lakes, ponds, springs, seepages, seasonally damp soils in shade.
|elevation=0–3000 m.
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Yukon;Ala.;Alaska;Ariz.;Ark.;Calif.;Conn.;Del.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Miss.;Mo.;Mont.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;Wash.;Wis.;Mexico;West Indies (Antilles);Central America;South America;introduced in Pacific Islands (New Zealand).
|reference=None
|publication title=Fl. Amer. Sept.
|publication year=1813
|special status=Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V17/V17_155.xml
|genus=Callitriche
|species=Callitriche heterophylla
}}<!--

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