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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.
The white oak is the only known food plant of the Bucculatrix luteella and Bucculatrix ochrisuffusa caterpillars. The young shoots of many eastern oak species are readily eaten by deer. [21] Dried oak leaves are also occasionally eaten by white-tailed deer in the fall or winter. [22] Rabbits often browse twigs and can girdle stems. [21]
– 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
Quercus ilicifolia, commonly known as bear oak or scrub oak, is a small shrubby oak native to the Eastern United States and, less commonly, in southeastern Canada.Its range in the United States extends from Maine to North Carolina, with reports of a few populations north of the international frontier in Ontario. [3]
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 ...
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 ellipsoidalis, the northern pin oak or Hill's oak, is a North American species of oak tree native to the north-central United States and south-central Canada, primarily in the Great Lakes region and the Upper Mississippi Valley. [2] It most commonly occurs on dry, sandy soils. [3]
Quercus myrtifolia, the myrtle oak, [3] is a North American species of oak. It is native to the southeastern United States (Mississippi, Alabama, Florida, Georgia, South Carolina). It is often found in coastal areas on sandy soils. [4] It is an evergreen tree that can reach 12 meters (39 feet) tall, also appearing as a shrub in drier sites.