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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.
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 ]
– 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 michauxii, the swamp chestnut oak, is a species of oak in the white oak section Quercus section Quercus in the beech family. It is native to bottomlands and wetlands in the southeastern and midwestern United States, in coastal states from New Jersey to Texas, inland primarily in the Mississippi–Ohio Valley as far as Oklahoma, Missouri, Illinois, and Indiana.
“A short list of just a few of them would have to include black oak (Quercus velutina), blackjack oak (Quercus marilandica), post oak (Quercus stellata), and many of the southwestern species ...
This leads to a lack of oak seedings and saplings to grow and replace mature oaks (Quercus spp.) once they die and growth in abundance of new species. Deer browse is also a large threat to the plant community as white-tailed deer (Odocoileus virginianus) use oak seedlings for consumption at growing rates with increasing population sizes. [6]
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 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.