View source for Wolffia arrhiza

{{Treatment/ID
|accepted_name=Wolffia arrhiza
|accepted_authority=(Linnaeus) Horkel ex Wimmer
|publications={{Treatment/Publication
|title=Fl. Schles., ed. 3
|place=140. 1857
|year=1857
}}
|basionyms={{Treatment/ID/Synonym
|name=Lemna arrhiza
|authority=Linnaeus
}}
|synonyms=
|hierarchy=Lemnaceae;Wolffia;Wolffia arrhiza
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Lemnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Wolffia]]</div><div class="higher-taxon"><small>species</small>[[Wolffia arrhiza]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=page 152
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Fronds </b>globular to ovoid, 0.5–1.5 mm, 1–1.3 times as long as wide, 1.2–1.5 times as deep as wide, slightly pointed at apex, papilla absent; upper surface intensely green (not transparent), with 10–100 stomates; pigment cells absent in vegetative tissue. <b>2n</b> = 30, 40, 42, 44–46, 50, 60, 62 (Europe, Africa).</span><!--

-->{{Treatment/Body
|phenology=Flowering (very rare) late spring–summer.
|habitat=Mesotrophic to eutrophic, quiet waters in temperate to subtropical regions with relatively mild winters
|elevation=0–800 m
|distribution=Calif.;South America (Brazil);w Eurasia;Africa.
|discussion=<p>Wolffia arrhiza was reported from Alberta because of the size of epidermal cells (G. C. D. Griffiths 1988). The plants are within the variation shown by W. columbiana, however.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Wolffia arrhiza
|author=
|authority=(Linnaeus) Horkel ex Wimmer
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Lemna arrhiza
|family=Lemnaceae
|phenology=Flowering (very rare) late spring–summer.
|habitat=Mesotrophic to eutrophic, quiet waters in temperate to subtropical regions with relatively mild winters
|elevation=0–800 m
|distribution=Calif.;South America (Brazil);w Eurasia;Africa.
|introduced=true
|reference=None
|publication title=Fl. Schles., ed. 3
|publication year=1857
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V22/V22_271.xml
|genus=Wolffia
|species=Wolffia arrhiza
}}<!--

-->[[Category:Treatment]][[Category:Wolffia]]