View source for Decodon ← Decodon 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=Decodon |accepted_authority=J. F. Gmelin |publications={{Treatment/Publication |title=Syst. Nat. |place=1: 656, 677. 1791 |year=1791 }} |common_names=Swamp loosestrife;water willow;décodon verticillé |basionyms= |synonyms= |hierarchy=Lythraceae;Decodon |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Lythraceae]]</div><div class="higher-taxon"><small>genus</small>[[Decodon]]</div></div> |etymology=Greek dekas, ten, and odon, tooth, alluding to combination of five sepals and five alternating epicalyx segments |volume=Volume 10 |mention_page= |treatment_page= }}<!-- --><span class="statement" id="st-d0_s0" data-properties="shrub growth form or habitat;shrub atypical some measurement;shrub some measurement;shrub pubescence;shrub pubescence;subshrub growth form or habitat;subshrub atypical some measurement;subshrub some measurement;subshrub pubescence;subshrub pubescence"><b>Shrubs </b>or subshrubs, aquatic, (5–) 10–30 dm, glabrous or velutinous.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem orientation;stem architecture;stem architecture;stem orientation;tip location;stem orientation;stem location;stem size or width;aerenchymum texture"><b>Stems </b>erect or arching, branched or unbranched, spreading vegetatively by rooting from submerged tips of arching stems, submerged stems often thickened by external layers of spongy aerenchyma.</span> <span class="statement" id="st-d0_s2" data-properties=""><b>Leaves </b>opposite or 3-whorled;</span> <span class="statement" id="st-d0_s3" data-properties="leaf arrangement;leaf arrangement;leaf architecture">petiolate;</span> <span class="statement" id="st-d0_s4" data-properties="blade shape;base shape">blade lanceolate, base attenuate.</span> <span class="statement" id="st-d0_s5" data-properties="inflorescence development;inflorescence position;inflorescence architecture;inflorescence architecture;inflorescence architecture"><b>Inflorescences </b>indeterminate, axillary, simple or compound cymes, 3+-flowered.</span> <span class="statement" id="st-d0_s6" data-properties="flower architecture;flower architecture"><b>Flowers </b>pedicellate, actinomorphic, tristylous;</span> <span class="statement" id="st-d0_s7" data-properties="floral-tube position;floral-tube shape">floral-tube perigynous, campanulate;</span> <span class="statement" id="st-d0_s8" data-properties="epicalyx segment length or size">epicalyx segments ca. 2 times longer than sepals;</span> <span class="statement" id="st-d0_s9" data-properties="sepal atypical quantity;sepal quantity;sepal quantity">sepals (4 or) 5 (–7), to 1/3 floral-tube length;</span> <span class="statement" id="st-d0_s10" data-properties="petal duration;petal duration;petal atypical quantity;petal quantity;petal coloration">petals caducous or deciduous, (4 or) 5 (–7), rose-purple;</span> <span class="statement" id="st-d0_s11" data-properties="nectariferous tissue presence">nectariferous tissue present in lower ovary wall;</span> <span class="statement" id="st-d0_s12" data-properties="stamen atypical quantity;stamen quantity">stamens (8–) 10;</span> <span class="statement" id="st-d0_s13" data-properties="ovary architecture or structure in adjective form">ovary 3 (–5) -locular;</span> <span class="statement" id="st-d0_s14" data-properties="placenta shape">placenta elongate;</span> <span class="statement" id="st-d0_s15" data-properties="style size">style slender;</span> <span class="statement" id="st-d0_s16" data-properties="stigma architecture or shape">stigma capitate.</span> <span class="statement" id="st-d0_s17" data-properties="wall width;wall condition or texture;wall dehiscence"><b>Fruits </b>capsules, walls moderately thick and dry, dehiscence loculicidal.</span> <span class="statement" id="st-d0_s18" data-properties="seed quantity;seed shape"><b>Seeds </b>20–30, obpyramidal;</span> <span class="statement" id="st-d0_s19" data-properties="cotyledon shape">cotyledons ± complanate.</span><!-- -->{{Treatment/Body |distribution=c;e North America |discussion=<p>Species 1.</p><!-- --><p>Although Decodon is now monospecific and endemic to the central and eastern United States, it formerly had a nearly global distribution in the northern latitudes. Fossil seeds of Decodon from the Late Cretaceous (73.5 Ma) of northern Mexico represent the second oldest known occurrence of Lythraceae in the world, second only to pollen of Lythrum from the Late Cretaceous (82–81 Ma) of Wyoming. Decodon was widespread and diverse during the Miocene in both hemispheres; it became severely reduced as climates cooled in the Pliocene and thereafter, ultimately becoming restricted to D. verticillatus in eastern North America (S. A. Graham 2013).</p> |tables= |references= }}<!-- --><!-- -->{{#Taxon: name=Decodon |author=Shirley A. Graham |authority=J. F. Gmelin |rank=genus |parent rank=family |synonyms= |basionyms= |family=Lythraceae |distribution=c;e North America |reference=None |publication title=Syst. Nat. |publication year=1791 |special status= |source xml= |genus=Decodon |aerenchymum texture=spongy |base shape=attenuate |blade shape=lanceolate |cotyledon shape=complanate |epicalyx segment length or size=2 times longer than sepals |floral-tube position=perigynous |floral-tube shape=campanulate |flower architecture=actinomorphic;pedicellate |inflorescence architecture=3+-flowered;compound;simple |inflorescence development=indeterminate |inflorescence position=axillary |leaf architecture=petiolate |leaf arrangement=3-whorled;opposite |nectariferous tissue presence=absent |ovary architecture or structure in adjective form=3(-5)-locular |petal atypical quantity=5;7 |petal coloration=rose-purple |petal duration=deciduous;caducous |petal quantity=5 |placenta shape=elongate |seed quantity=20;30 |seed shape=obpyramidal |sepal atypical quantity=5;7 |sepal quantity=0;1/3 |shrub atypical some measurement=5dm;10dm |shrub growth form or habitat=aquatic |shrub pubescence=velutinous;glabrous |shrub some measurement=10dm;30dm |stamen atypical quantity=8;10 |stamen quantity=10 |stem architecture=unbranched;branched |stem location=submerged |stem orientation=arching;spreading;arching;erect |stem size or width=thickened |stigma architecture or shape=capitate |style size=slender |subshrub atypical some measurement=5dm;10dm |subshrub growth form or habitat=aquatic |subshrub pubescence=velutinous;glabrous |subshrub some measurement=10dm;30dm |tip location=submerged |wall condition or texture=dry |wall dehiscence=loculicidal |wall width=thick }}<!-- -->[[Category:Treatment]][[Category:Lythraceae]] Templates used on this page: Template:Lythraceae (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 Decodon.