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  2. Quercus agrifolia - Wikipedia

    en.wikipedia.org/wiki/Quercus_agrifolia

    Quercus agrifolia, the California live oak, [3] or coast live oak, is an evergreen [4] live oak native to the California Floristic Province.Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. [5]

  3. Quercus virginiana - Wikipedia

    en.wikipedia.org/wiki/Quercus_virginiana

    Although live oaks retain their leaves nearly year-round, they are not true evergreens.Live oaks drop their leaves immediately before new leaves emerge in the spring. Occasionally, senescing leaves may turn yellow or contain brown spots in the winter, leading to the mistaken belief that the tree has oak wilt, whose symptoms typically occur in the sum

  4. Live oak - Wikipedia

    en.wikipedia.org/wiki/Live_oak

    According to the Live Oak Society the oldest southern live oak is believed to be the Seven Sisters Oak located in Mandeville, Louisiana with an estimated age of 500–1,000 years. [3] The southern live oak is the official state tree of Georgia. The Seal of Texas includes a live oak branch. A small grove of live oaks on a prairie is known as a ...

  5. Quercus geminata - Wikipedia

    en.wikipedia.org/wiki/Quercus_geminata

    A small- to medium-sized tree, the sand live oak is scrubby and forms thickets. The bark is dark, thick, furrowed, and roughly ridged. The leaves are thick, leathery, and coarsely veined, with extremely revolute margins, giving them the appearance of inverted shallow bowls; their tops dark green, their bottoms dull gray and very tightly tomentose, and their petioles densely pubescent, they are ...

  6. Phytophthora ramorum - Wikipedia

    en.wikipedia.org/wiki/Phytophthora_ramorum

    The disease kills oak and other species of trees and has had devastating effects on the oak populations in California and Oregon, as well as being present in Europe. Symptoms include bleeding cankers on the tree's trunk and dieback of the foliage , in many cases leading to the death of the tree.

  7. Quercus turbinella - Wikipedia

    en.wikipedia.org/wiki/Quercus_turbinella

    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.

  8. Quercus chrysolepis - Wikipedia

    en.wikipedia.org/wiki/Quercus_chrysolepis

    Quercus chrysolepis, commonly termed canyon live oak, canyon oak, golden cup oak or maul oak, is a North American species of evergreen oak.Its leaves are a glossy dark green on the upper surface with prominent spines; a further identification arises from the leaves of canyon live oak being geometrically flat.

  9. Quercus fusiformis - Wikipedia

    en.wikipedia.org/wiki/Quercus_fusiformis

    Escarpment live oak is typically found on dry sites, unlike southern live oak, which prefers moister conditions. The tree, especially the Quartz Mountains variety, is generally accepted to be the hardiest evergreen oak, able to withstand very cold winters with minimal leaf burn in areas as cold as USDA zone 6a. For this reason the tree has ...