Biology:Planera
| Planera | |
|---|---|
| |
| Planera aquatica | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | Planera J.F.Gmel. |
| Species | |
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See text | |
Planera is a genus of flowering plants with a single living species, Planera aquatica,[1] the planertree[2] 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.[3] The living species is found in the southeastern United States , it is a small deciduous tree 10–15 m (390–590 in) tall, closely related to the elms but with a softly, prickly nut 10–15 mm (0.39–0.59 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.[4]
Species
Fossil species
- †Planera antiqua Heer, 1883 (Santonian-Campanian; Paatuut Formation, Greenland)
- †Planera aquaticiformis Hollick, 1936 (Paleocene/Eocene; "Berg Lake flora", Alaska)
- †Planera australis Ettingshausen, 1887 (Late Cretaceous; Otago, New Zealand)
- †Planera chankaensis Pavlyutkin, 2005 (Miocene; Novokachalinsk, Russia)
- †Planera crenata Newberry, 1883 (jr homonym, replacement name P. lingualis)
- †Planera cretacea Berry, 1907 (Cretaceous; North Carolina)
- †Planera dubia Lesquereux, 1859 (Eocene, Chuckanut Formation, Washington)
- †Planera emarginata (Göppert) Heer, 1856 (Tortonian, Poland)
- †Planera ezoana Ôishi & Huzioka, 1954 (Eocene; Hokkaido, Japan)
- †Planera hebridica Simpson, 1961 ("Cenozoic"; Isle of Mull, Scotland)
- †Planera knowltoniana Newberry, 1896 (Cenomanian; Raritan Formation, Virginia)
- †Planera mullensis Simpson, 1961 ("Cenozoic"; Isle of Mull, Scotland)
- †Planera myricifolia (Lesquereux) Cockerell, 1908 (Priabonian; Florissant Formation, Colorado)
- †Planera parvula Saporta, 1888 (Oligocene; France)
- †Planera subkeaki (Rérolle) Saporta, 1888 (Tortonian; La Cerdagnya, France)
- †Planera thompsoniana Traverse, 1955 (Burdigalian; Brandon lignite, Vermont)
- †Planera ulmifolia Schloemer-Jäger, 1958 (Paleocene; Brøgger peninsula, Spitsbergen)
- †Planera variabilis Newberry, 1883 (Ypresian; Green River Formation, Wyoming)
Species formerly included in Planera
- †Abelicea ungeri (Kováts ex Ettingshausen) Holmboe
- †Cedrelospermum nervosum (Newberry) Manchester
- †Chaetoptelea microphylla (Newberry) Hickey
- †Fagopsis longifolia Lesquereux
References
- ↑ "Search results for Planera". The Plant List. http://www.theplantlist.org/tpl1.1/search?q=Planera. Retrieved 1 March 2016.
- ↑ "Planera aquatica". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=PLAQ. Retrieved 7 October 2015.
- ↑ "Planera". http://ifpni.org/genus.htm?id=451A98E2-0298-493C-8B99-A37EC66EB5A1. Retrieved 8 Feb 2023.
- ↑ "Water Elm Ulmaceae Planera aquatica J.F. Gmel.". Virginia Tech Department of Forestry and Environmental Conservation. http://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=347. Retrieved December 15, 2014.
Wikidata ☰ Q2578841 entry
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