View source for Spirodela ← Spirodela You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. 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-undefined" data-properties=""><b>Roots </b>(1–)2–21 per frond, abaxial surface at node. <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; air spaces in tissue; reproductive pouches 2, lateral, at base from which daughter fronds and flowers originate, triangular; veins (3–)5–16(–21), from point in proximal part of frond (node); small bifid 2-cleft membranous scale (interpreted as prophyllum) enveloping base of frond, covering point of attachment of roots; anthocyanins present (especially on abaxial surface); pigment cells present (visible in dead fronds as brown dots); turions present or absent, brownish olive, circular-reniform, smaller than growing frond. <b>Flowers</b> 1(–2) per frond, surrounded by small utricular, membranous scale; stamens 2, 4-locular. <b>Seeds</b> 1–3, longitudinally ribbed. <b>x</b> = 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://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_578.xml |genus=Spirodela }}<!-- -->[[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.