View source for Lemna obscura

{{Treatment/ID
|accepted_name=Lemna obscura
|accepted_authority=(Austin) Daubs
|publications={{Treatment/Publication
|title=Illinois Biological Monographs
|place=34: 20. 1965
|year=1965
}}
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Lemna minor var. obscura
|authority=Austin
|rank=variety
|publication_title=in A. Gray, Manual ed.
|publication_place=5, 479. 1867
}}
|synonyms=
|hierarchy=Lemnaceae;Lemna;Lemna obscura
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Lemnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Lemna]]</div><div class="higher-taxon"><small>species</small>[[Lemna obscura]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>to 15 cm, tip mostly rounded; sheath not winged. <b>Stipes</b> white, small, often decaying. <b>Fronds</b> floating, 1 or 2–5 or more, coherent in groups, obovate, flat or gibbous, 1–3.5 mm, 1–1.5 times as long as wide, margins entire; veins 3, greatest distance between lateral veins near middle; very distinct papillae near apex, some smaller indistinct ones on midline of upper surface; lower surface very often red colored (more intensely than on upper), coloring beginning at attachment point of root, lower upper surface sometimes with red spots; air spaces shorter than 0.3 mm; distinct turions absent. <b>Flowers</b>: ovaries 1-ovulate, utricular scale with narrow opening at apex. <b>Fruits</b> 0.5–0.7 mm, not winged. <b>Seeds</b> with 10–16 distinct ribs, staying within fruit wall after ripening. <b>2n</b> = 40, 42, 50.</span><!--

-->{{Treatment/Body
|phenology=Flowering (occasional) spring–fall.
|habitat=Mesotrophic to –eutrophic, quiet waters, in temperate to subtropical regions with mild winters
|elevation=0–800 m
|distribution=Ala.;Ark.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Minn.;Miss.;Mo.;Nebr.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;S.Dak.;Tenn.;Tex.;Va.;Wis.;c Mexico;South America (Colombia;Ecuador);Hawaii.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Lemna obscura
|authority=(Austin) Daubs
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Lemna minor var. obscura
|family=Lemnaceae
|phenology=Flowering (occasional) spring–fall.
|habitat=Mesotrophic to –eutrophic, quiet waters, in temperate to subtropical regions with mild winters
|elevation=0–800 m
|distribution=Ala.;Ark.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Minn.;Miss.;Mo.;Nebr.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;S.Dak.;Tenn.;Tex.;Va.;Wis.;c Mexico;South America (Colombia;Ecuador);Hawaii.
|reference=None
|publication title=Illinois Biological Monographs
|publication year=1965
|special status=Weedy;Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V22/V22_253.xml
|genus=Lemna
|species=Lemna obscura
}}<!--

-->[[Category:Treatment]][[Category:Lemna]]