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An estimated 31% of the world's oak species are threatened with extinction, while 41% of oak species are considered to be of conservation concern. The countries with the highest numbers of threatened oak species (as of 2020) are China with 36 species, Mexico with 32 species, Vietnam with 20 species, and the US with 16 species.
– Chinkapin oak – eastern, central, and southwestern US (West Texas and New Mexico), northern Mexico; Quercus ningqiangensis S.Z.Qu & W.H.Zhang – southeastern China; Quercus oblongifolia Torr. – Arizona blue oak, Southwestern blue oak, or Mexican blue oak – # southwestern U.S., northwestern Mexico; Quercus obtusata Bonpl. – Mexico
The current oak–hickory forest includes the former range of the oak–chestnut forest region, which encompassed the northeast portion of the current oak–hickory range. When the American chestnut population succumbed to invasive fungal blight in the early 20th century, those forests shifted to an oak and hickory dominated ecosystem.
Plus a half-dozen other oak species, hickories, wild black cherry, two huge sycamores, a white pine, our native dry-land dogwood Cornus racemosa, as opposed to the large-flowered Cornus Florida ...
In the southeastern United States, it is frequently a part of the canopy in an oak-heath forest, but generally not as important as some other oaks. [9] [10] [6] Northern red oak is the most common species of oak in the northeastern US after the closely related pin oak (Q. palustris). The red oak group as a whole are more abundant today than ...
A mix of oak and pine tree species dominate the canopy, typically chestnut oak (Quercus prinus), Virginia pine (Pinus virginiana), and white pine (Pinus strobus), but sometimes white oak (Quercus alba) or scarlet oak (Quercus coccinea). Varying amounts of oaks and pines can result in oak forests, mixed oak–pine forests, or small pine forests.
Quercus virginiana, also known as the southern live oak, is an evergreen oak tree endemic to the Southeastern United States. [5] Though many other species are loosely called live oak, the southern live oak is particularly iconic of the Old South.
Quercus turbinella is a North American species of oak known by the common names shrub oak, turbinella oak, shrub live oak, and gray oak. [4] [5] [6] It is native to Arizona, California, New Mexico, Utah, Colorado, and Nevada in the western United States. [4] It also occurs in northern Mexico. [7] Arizona shrub oak acorns. Quercus turbinella.