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Quercus nigra, the water oak, is an oak in the red oak group (Quercus sect. Lobatae), native to the eastern and south-central United States, found in all the coastal states from New Jersey to Texas, and inland as far as Oklahoma, Kentucky, and southern Missouri. [3] It occurs in lowlands and up to 450 meters (1,480 feet) in elevation.
The genus Quercus contains about 500 known species, plus about 180 hybrids between them. [1] The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus Quercus was divided into the two subgenera Cyclobalanopsis, the ring-cupped oaks, and Quercus, which included
Quercus nigra, Water Oak; Quercus rubra, Northern Red Oak; ... an encyclopedia of characteristics for around 200 tree species native to the United States published by ...
An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn , borne within a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen .
Native ash species, including white ash (pictured), have been declining rapidly this century due to predation by the emerald ash borer. [1]Silvics of North America (1991), [2] [3] a forest inventory compiled and published by the United States Forest Service, includes many hardwood trees.
The tree is found on the edges of bodies of water and swamps, in association with sweetgum (Liquidambar styraciflua), water oak (Quercus nigra), and black tupelo (Nyssa sylvatica). In more sheltered habitats, it grows into a large tree, but can be a low shrub when found on coastal dunes. [ 13 ]
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Chinkapin oak (Quercus muhlenbergii) Canyon live oak (Quercus chrysolepis) Overcup oak (Quercus lyrata) English oak (Quercus robur) Red oak. Northern red oak (Quercus rubra) Eastern black oak (Quercus velutina) Laurel oak (Quercus laurifolia) Southern red oak (Quercus falcata) Water oak (Quercus nigra) Willow oak (Quercus phellos) Nuttall's oak ...