View source for Planera

{{Short description|Genus of flowering plants}}
{{Automatic taxobox
|image = NAS-130y Planera aquatica.png
|image_caption = ''Planera aquatica''
|taxon = Planera
|authority = [[Johann Friedrich Gmelin|J.F.Gmel.]]
|subdivision_ranks = Species
|subdivision = See text
|range_map =
|range_map_caption =
}}
'''''Planera''''' is a [[genus]] of [[flowering plant]]s with a single living species, ''[[Planera aquatica]]'',<ref name=TPL_Planera>{{cite web |title=Search results for ''Planera''|work=The Plant List |url=http://www.theplantlist.org/tpl1.1/search?q=Planera |accessdate=1 March 2016 }}</ref> the '''planertree'''<ref name=":0">{{PLANTS|id=PLAQ|taxon=Planera aquatica|accessdate=7 October 2015}}</ref> or '''water elm'''. The genus has an extensive fossil record dating back to the [[Cretaceous]] and spanning the northern hemisphere, with a few southern hemisphere records as well.<ref name="IFPNI2023">{{cite web |url=http://ifpni.org/genus.htm?id=451A98E2-0298-493C-8B99-A37EC66EB5A1 |website=The International Fossil Plant Names Index |title=''Planera'' |accessdate=8 Feb 2023}}</ref> The living species is found in the southeastern [[United States]], it is a small [[deciduous]] [[tree]] {{cvt|10–15|m|in}} tall, closely related to the [[elm]]s but with a softly, prickly [[nut (fruit)|nut]] {{cvt|10–15|mm|in}} diameter, instead of a winged seed. It grows, as the name suggests, on wet sites. Despite its common English name, this species is not a true elm, although it is a close relative of the elms (species of the genus ''Ulmus''). It is also subject to [[Dutch elm disease]], a disease which affects only members of the Ulmaceae. It is native to most of the southeast United States. It is hardy down to Zone 7.<ref>{{cite web|url=http://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=347|title=Water Elm Ulmaceae ''Planera aquatica'' J.F. Gmel.|publisher=Virginia Tech Department of Forestry and Environmental Conservation|accessdate=December 15, 2014}}</ref>
==Species==
*''[[Planera aquatica]]''
===Fossil species===
{{div col}}
*†''[[Planera antiqua]]'' {{small|[[Oswald Heer|Heer]], 1883}} ([[Santonian]]-[[Campanian]]; [[Paatuut Formation]], Greenland)
*†''[[Planera aquaticiformis]]'' {{small|[[Arthur Hollick|Hollick]], 1936}} (Paleocene/Eocene; "Berg Lake flora", Alaska)
*†''[[Planera australis]]'' {{small|[[Constantin von Ettingshausen|Ettingshausen]], 1887}} (Late Cretaceous; Otago, New Zealand)
*†''[[Planera chankaensis]]'' {{small|Pavlyutkin, 2005}} (Miocene; Novokachalinsk, Russia)
*†''[[Planera crenata]]'' {{small|[[John Strong Newberry|Newberry]], 1883}} (jr homonym, replacement name ''P. lingualis'')
*†''[[Planera cretacea]]'' {{small|[[Edward W. Berry|Berry]], 1907}} (Cretaceous; North Carolina)
*†''[[Planera dubia]]'' {{small|[[Leo Lesquereux|Lesquereux]], 1859}} (Eocene, [[Chuckanut Formation]], Washington)
*†''[[Planera emarginata]]'' {{small|([[Heinrich Göppert|Göppert]]) Heer, 1856}} (Tortonian, Poland)
*†''[[Planera ezoana]]'' {{small|Ôishi & Huzioka, 1954}} (Eocene; Hokkaido, Japan)
*†''[[Planera hebridica]]'' {{small|Simpson, 1961}} ("Cenozoic"; Isle of Mull, Scotland)
*†''[[Planera knowltoniana]]'' {{small|Newberry, 1896}} (Cenomanian; [[Raritan Formation]], Virginia)
*†''[[Planera mullensis]]'' {{small|Simpson, 1961}} ("Cenozoic"; Isle of Mull, Scotland)
*†''[[Planera myricifolia]]'' {{small|(Lesquereux) Cockerell, 1908}} (Priabonian; [[Florissant Formation]], Colorado)
*†''[[Planera parvula]]'' {{small|[[Gaston de Saporta|Saporta]], 1888}} (Oligocene; France)
*†''[[Planera subkeaki]]'' {{small|(Rérolle) Saporta, 1888}} (Tortonian; La Cerdagnya, France)
*†''[[Planera thompsoniana]]'' {{small|Traverse, 1955}} (Burdigalian; [[Brandon lignite]], Vermont)
*†''[[Planera ulmifolia]]'' {{small|Schloemer-Jäger, 1958}} (Paleocene; Brøgger peninsula, Spitsbergen)
*†''[[Planera variabilis]]'' {{small|Newberry, 1883}} (Ypresian; [[Green River Formation]], Wyoming)
{{div col end}}
===Species formerly included in ''Planera''===
*†''[[Abelicea ungeri]]'' {{small|(Kováts ex Ettingshausen) Holmboe}}
*†''[[Cedrelospermum nervosum]]'' {{small|(Newberry) Manchester}}
*†''[[Chaetoptelea microphylla]]'' {{small|(Newberry) Hickey}}
*†''[[Fagopsis longifolia]]'' {{small|Lesquereux}}
==References==
{{Reflist}}
{{Taxonbar|from=Q2578841}}
[[Category:Ulmaceae]]