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You can view and copy the source of this page. {{Treatment/ID |accepted_name=Spirodela |accepted_authority=Schleiden |publications={{Treatment/Publication |title=Linnaea |place=13: 391. 1839 |year=1839 }} |common_names=Duck-meal |basionyms= |synonyms= |hierarchy=Lemnaceae;Spirodela |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> |etymology=Greek speira, winding, and delos, distinct |volume=Volume 22 |mention_page= |treatment_page=page 145 }}<!-- --><span class="statement" id="st-d0_s0" data-properties="root atypical quantity;root quantity"><b>Roots </b>(1–) 2–21 per frond, abaxial surface at node.</span> <span class="statement" id="st-d0_s1" data-properties="frond growth form or location;frond quantity;frond fusion;frond shape;frond shape;frond shape;frond some measurement"><b>Fronds </b>floating (only turions sink to bottom), 2–10, coherent in groups, each obovate-circular, flat or gibbous, 1.5–10 mm, margins entire;</span> <span class="statement" id="st-d0_s2" data-properties="margin architecture or shape">air spaces in tissue;</span> <span class="statement" id="st-d0_s3" data-properties="reproductive pouch quantity;reproductive pouch position;daughter frond shape;daughter flower shape">reproductive pouches 2, lateral, at base from which daughter fronds and flowers originate, triangular;</span> <span class="statement" id="st-d0_s4" data-properties="vein atypical quantity;vein atypical quantity;vein quantity">veins (3–) 5–16 (–21), from point in proximal part of frond (node);</span> <span class="statement" id="st-d0_s5" data-properties="frond scale size;frond scale architecture or shape;frond scale architecture or shape;frond scale texture">small bifid 2-cleft membranous scale (interpreted as prophyllum) enveloping base of frond, covering point of attachment of roots;</span> <span class="statement" id="st-d0_s6" data-properties="anthocyanins presence">anthocyanins present (especially on abaxial surface);</span> <span class="statement" id="st-d0_s7" data-properties="cell coloration;cell presence">pigment cells present (visible in dead fronds as brown dots);</span> <span class="statement" id="st-d0_s8" data-properties="turion presence;turion presence;turion coloration;turion shape;turion size">turions present or absent, brownish olive, circular-reniform, smaller than growing frond.</span> <span class="statement" id="st-d0_s9" data-properties="flower atypical quantity;flower quantity;utricular size;scale texture"><b>Flowers </b>1 (–2) per frond, surrounded by small utricular, membranous scale;</span> <span class="statement" id="st-d0_s10" data-properties="stamen quantity;stamen architecture or structure in adjective form">stamens 2, 4-locular.</span> <span class="statement" id="st-d0_s11" data-properties=""><b>Seeds </b>1–3, longitudinally ribbed.</span> <span class="statement" id="st-d0_s12" data-properties="seed quantity;seed architecture or shape;x chromosome quantity;x chromosome quantity;x chromosome quantity">x = 10, 18, 23.</span><!-- -->{{Treatment/Body |distribution=Nearly worldwide |discussion=<p>Species 3 (2 in the flora).</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Fronds 1–1.5 times as long as wide, with 7–16(–21) veins and 7–21 roots, 1 or 2 perforating scale |[[Spirodela polyrrhiza|Spirodela polyrrhiza]] |-id=key-0-1 |1 |Fronds 1.5–2 times, as long as wide, with (3–)5–7 veins and (1–)2–7(–12) roots, all perforating scale. |[[Spirodela punctata|Spirodela punctata]] |} </div></div><!-- -->{{#Taxon: name=Spirodela |authority=Schleiden |rank=genus |parent rank=family |synonyms= |basionyms= |family=Lemnaceae |distribution=Nearly worldwide |reference=None |publication title=Linnaea |publication year=1839 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/62857cf6bca5c4637d27b113da92d27dbf9962f4/V22/V22_578.xml |genus=Spirodela |anthocyanins presence=absent |cell coloration=pigment |cell presence=absent |daughter flower shape=triangular |daughter frond shape=triangular |flower atypical quantity=1;2 |flower quantity=1 |frond fusion=coherent |frond growth form or location=floating |frond quantity=2;10 |frond scale architecture or shape=2-cleft;bifid |frond scale size=small |frond scale texture=membranous |frond shape=gibbous;flat;obovate-circular |frond some measurement=1.5mm;10mm |margin architecture or shape=entire |reproductive pouch position=lateral |reproductive pouch quantity=2 |root atypical quantity=1;2 |root quantity=2;21 |scale texture=membranous |seed architecture or shape=ribbed |seed quantity=1;3 |stamen architecture or structure in adjective form=4-locular |stamen quantity=2 |turion coloration=brownish olive |turion presence=absent;absent |turion shape=circular-reniform |turion size=smaller |utricular size=small |vein atypical quantity=16;21 |vein quantity=5;16 |x chromosome quantity=23;18;10 }}<!-- -->[[Category:Treatment]][[Category:Lemnaceae]] Templates used on this page: Template:Lemnaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Return to Spirodela.