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Quercus ilicifolia is a deciduous tree or shrub growing occasionally reaching a height of 6 meters (20 feet) but usually much smaller. [4] [5] It is gangly and can form a dense thicket. The plant grows from a large taproot, which reach 20 centimeters (8 inches) in thickness. The taproot lives a long time, producing several generations of above ...
Quercus × morehus, [3] Abram's oak in Kellogg's original description [4] (later called oracle oak by Jepson [5]), is a named hybrid between the red oaks Quercus kelloggii (California black oak) and Quercus wislizeni (interior live oak). [6]
Quercus havardii (common names include shinnery oak, shin oak and Havard oak) is a deciduous, low-growing, thicket-forming shrub that occupies some two million to three million hectares (7,700 to 11,600 square miles) in the southern Great Plains of North America. [2]
All oak trees may display foliage marcescence, even species that are known to fully drop leaves when the tree is mature. [7] Marcescent leaves of pin oak (Quercus palustris) complete development of their abscission layer in the spring. [8] The base of the petiole remains alive over the winter. Many other trees may have marcescent leaves in ...
Quercus emoryi, the Emory oak, is a species of oak common in Arizona (including inside Saguaro National Park), New Mexico and western Texas (including inside Big Bend National Park), United States, and northern Mexico (Sonora, Chihuahua, Coahuila (including Parque Nacional Maderas del Carmen), Durango, Nuevo León, and San Luis Potosí).
– 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 largest known Durand oak in the United States appeared on the National Register of Champion Trees in 2020. Located in Greene County, Alabama , the national champion specimen of Quercus sinuata var. sinuata was nominated in 2020 by Steve Gardiner and crowned on September 27, 2020, when it was last measured.
Quercus stellata, the post oak or iron oak, is a North American species of oak in the white oak section. It is a slow-growing oak that lives in dry areas on the edges of fields, tops of ridges, and also grows in poor soils, and is resistant to rot, fire, and drought. Interbreeding occurs among white oaks, thus many hybrid species combinations ...