View source for Wolffia ← Wolffia 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=Wolffia |accepted_authority=Horkel ex Schleiden |publications={{Treatment/Publication |title=Beitrage zur Botanik |place=1: 233. 1844 |year=1844 }} |common_names=Water-meal |basionyms= |synonyms= |hierarchy=Lemnaceae;Wolffia |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> |etymology=for Johann. F.riedrich Wolff, 1778–1806, German physician |volume=Volume 22 |mention_page= |treatment_page=page 151 }}<!-- --><span class="statement" id="st-d0_s0" data-properties="root presence"><b>Roots </b>absent.</span> <span class="statement" id="st-d0_s1" data-properties="frond location;frond location;frond quantity;frond quantity;frond fusion;frond shape;frond shape;frond shape;frond shape;frond shape;frond some measurement"><b>Fronds </b>floating or submersed (only turions sink to bottom), 1 or 2, coherent, each frond globular, ovoid, or boatshaped, 3-dimensional, smaller than 1.6 mm, margins entire;</span> <span class="statement" id="st-d0_s2" data-properties="margin architecture or shape">air spaces not in tissue;</span> <span class="statement" id="st-d0_s3" data-properties="">reproductive cavity terminal, at base from which daughter fronds (but no flowers) originate, conic, lower side of cavity with short tract of elongated cells along median line forming connection between node and attachment to mother frond;</span> <span class="statement" id="st-d0_s4" data-properties="vein presence">veins 0;</span> <span class="statement" id="st-d0_s5" data-properties="base presence">scale at base of frond absent;</span> <span class="statement" id="st-d0_s6" data-properties="anthocyanins presence">anthocyanins absent;</span> <span class="statement" id="st-d0_s7" data-properties="whole-organism presence;cell coloration;cell presence">in some species pigment cells present (visible in dead fronds as brown dots);</span> <span class="statement" id="st-d0_s8" data-properties="turion coloration;turion shape;turion size">turions light green, globular, smaller than growing fronds.</span> <span class="statement" id="st-d0_s9" data-properties="flower quantity"><b>Flowers </b>1 per frond, originating in cavity ± on median line of upper frond surface, not surrounded by utricular scale;</span> <span class="statement" id="st-d0_s10" data-properties="stamen quantity;stamen architecture or structure in adjective form">stamen 1, 2-locular.</span> <span class="statement" id="st-d0_s11" data-properties=""><b>Seeds </b>1, nearly smooth.</span> <span class="statement" id="st-d0_s12" data-properties="seed quantity;seed architecture or pubescence or relief;x chromosome quantity;x chromosome quantity;x chromosome quantity;x chromosome quantity;x chromosome quantity">x = 10, 20, 21, 22, 23.</span><!-- -->{{Treatment/Body |distribution=Nearly worldwide (except arctic and antarctic regions) |discussion=<p>Species 11 (5 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 boat-shaped, 0.3–1 times as deep as wide, with pigment cells in vegetative tissue. |[[#key-0-2| > 2]] |-id=key-0-1 |1 |Fronds globular to ovoid, 1–1.5 times as deep as wide, without pigment cells in the vegetative tissue. |[[#key-0-3| > 3]] |-id=key-0-2 |2 |Fronds 1–1.5 times as long as wide, rounded at apex, papilla usually prominent in center of upper surface |[[Wolffia brasiliensis|Wolffia brasiliensis]] |-id=key-0-2 |2 |Fronds 1.3–2 times as long as wide, with point at apex bent upwards, papilla absent |[[Wolffia borealis|Wolffia borealis]] |-id=key-0-3 |3 |Fronds with 10–100 stomates, slightly pointed at apex, the adaxial upper surface intensely green (not transparent) |[[Wolffia arrhiza|Wolffia arrhiza]] |-id=key-0-3 |3 |Fronds with 1–10(–30) stomates, rounded or slightly pointed at apex, upper surface transparently green. |[[#key-0-4| > 4]] |-id=key-0-4 |4 |Fronds 1.3–2 times as long as wide, 0.3–0.5 mm wide |[[Wolffia globosa|Wolffia globosa]] |-id=key-0-4 |4 |Fronds 1–1.3 times as long as wide, 0.4–1.2 mm wide |[[Wolffia columbiana|Wolffia columbiana]] |} </div></div><!-- -->{{#Taxon: name=Wolffia |authority=Horkel ex Schleiden |rank=genus |parent rank=family |synonyms= |basionyms= |family=Lemnaceae |distribution=Nearly worldwide (except arctic and antarctic regions) |reference=None |publication title=Beitrage zur Botanik |publication year=1844 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/62857cf6bca5c4637d27b113da92d27dbf9962f4/V22/V22_157.xml |genus=Wolffia |anthocyanins presence=absent |base presence=absent |cell coloration=pigment |cell presence=absent |flower quantity=1 |frond fusion=coherent |frond location=submersed;floating |frond quantity=2;1 |frond shape=boat-shaped;ovoid;boat-shaped;ovoid;globular |frond some measurement=1.6 |margin architecture or shape=entire |root presence=absent |seed architecture or pubescence or relief=smooth |seed quantity=1 |stamen architecture or structure in adjective form=2-locular |stamen quantity=1 |turion coloration=light green |turion shape=globular |turion size=smaller |vein presence=absent |whole-organism presence=absent |x chromosome quantity=23;22;21;20;10 }}<!-- -->[[Category:Treatment]][[Category:Lemnaceae]] Templates used on this page: 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