View source for Decodon

{{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-undefined" data-properties=""><b>Shrubs </b>or subshrubs, aquatic, (5–)10–30 dm, glabrous or velutinous. <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. <b>Leaves</b> opposite or 3-whorled; petiolate; blade lanceolate, base attenuate. <b>Inflorescences</b> indeterminate, axillary, simple or compound cymes, 3+-flowered. <b>Flowers</b> pedicellate, actinomorphic, tristylous; floral tube perigynous, campanulate; epicalyx segments ca. 2 times longer than sepals; sepals (4 or)5(–7), to 1/3 floral tube length; petals caducous or deciduous, (4 or)5(–7), rose purple; nectariferous tissue present in lower ovary wall; stamens (8–)10; ovary 3(–5)-locular; placenta elongate; style slender; stigma capitate. <b>Fruits</b> capsules, walls moderately thick and dry, dehiscence loculicidal. <b>Seeds</b> 20–30, obpyramidal; 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=
}}<!--

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-->{{#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=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/1f4bf54ae2f7dbd5376c45b4fe1b388e15b53086/coarse_grained_fna_xml/V10/V10_529.xml
|genus=Decodon
}}<!--

-->[[Category:Treatment]][[Category:Lythraceae]]