View source for Lactuca biennis

{{Treatment/ID
|accepted_name=Lactuca biennis
|accepted_authority=(Moench) Fernald
|publications={{Treatment/Publication
|title=Rhodora
|place=42: 300. 1940
|year=1940
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Sonchus biennis
|authority=Moench
|rank=species
|publication_title=Methodus,
|publication_place=545. 1794
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Lactuca;Lactuca biennis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cichorieae]]</div><div class="higher-taxon"><small>genus</small>[[Lactuca]]</div><div class="higher-taxon"><small>species</small>[[Lactuca biennis]]</div></div>
|volume=Volume 19
|mention_page=page 260
|treatment_page=page 261
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>or biennials, (15–)75–200(–300+) cm. <b>Leaves</b> on proximal 2/3–3/4 of each stem; blades of undivided cauline leaves ovate to lanceolate, margins entire or denticulate, midribs sometimes sparsely piloso-setose. <b>Heads</b> in paniculiform arrays. <b>Involucres</b> 7–12+ mm. <b>Phyllaries</b> usually reflexed in fruit. <b>Florets</b> (15–)20–30(–50+); corollas bluish or whitish, sometimes yellowish, seldom deliquescent. <b>Cypselae</b>: bodies brown (often mottled), ± compressed-ellipsoid, 4–5+ mm, beaks ± stout, 0.1–0.5+ mm, faces (4–)5–6-nerved; pappi ± fuscous, 4–6+ mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Oct.
|habitat=Swamps, stream banks, woods
|elevation=900–1500 m
|distribution=St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Oreg.;Pa.;R.I.;S.Dak.;Tenn.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.
|discussion=<p>The type of <i>Lactuca</i> terrae-novae Fernald is probably conspecific with that of <i>L. biennis</i>. The type of <i>L. biennis</i> may be conspecific with that of <i>L. floridana</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Lactuca biennis
|authority=(Moench) Fernald
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Sonchus biennis
|family=Asteraceae
|phenology=Flowering Jul–Oct.
|habitat=Swamps, stream banks, woods
|elevation=900–1500 m
|distribution=St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Oreg.;Pa.;R.I.;S.Dak.;Tenn.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.
|reference=None
|publication title=Rhodora
|publication year=1940
|special status=Illustrated;Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V19_348.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Lactuca
|species=Lactuca biennis
}}<!--

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