Planera · Lablypedia

In a nutshell

Planera is a genus of flowering plants with a single living species, Planera aquatica, the planertree 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. 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.

Related on Lably

Through Flowering plant and Tree

Lab · Class 11Morphology of Flowering Plants — Animated Chapter Film Lab · Class 11Anatomy of Flowering Plants — Animated Chapter Film Lab · Class 9–11Inside a Plant Lab · Class 8–12Using a Microscope

Species

Planera aquatica

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

More in Plants

Molecular phylogeneticsBranch of phylogeny that analyzes genetic, hereditary molecular differences MicrometreUnit of length; one millionth of a metre PerennialPlant that lives for more than two years DeciduousPlants that shed leaves seasonally Gram-negative bacteriaGroup of bacteria that do not retain the Gram stain used in bacterial differentiation LegumePlants in the family Fabaceae