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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
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 ]
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 .
Quercus hemisphaerica is a medium-sized evergreen to semi-evergreen tree which can grow as tall as 35 meters (115 feet) with a trunk diameter of 1.5 m (5 ft), although it is more commonly around 18–20 m (59–66 ft) tall.
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.
Quercus falcata Michaux [1]: 98 Southern Red Oak, Spanish Oak: Common state-wide Least Concern: Fagaceae: Quercus geminata Small [1]: 99 Sand Live Oak: Lower Coastal Plain: Least Concern: Fagaceae: Quercus georgiana M. A. Curtis [1]: 99 Georgia Oak: Granite outcrops in the Piedmont: Endangered: Fagaceae: Quercus hemisphaerica Bartram ex Willd ...
Quercus cerris, the Turkey oak or Austrian oak, [3] [4] is an oak native to south-eastern Europe and Asia Minor. It is the type species of Quercus sect. Cerris , a section of the genus characterised by shoot buds surrounded by soft bristles, bristle-tipped leaf lobes, and acorns that usually mature in 18 months.