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 summer.
A live oak's defoliation may occur sooner in marginal climates or in dry or cold winters.

The bark is dark, thick, and furrowed longitudinally.
 The leaves are stiff and leathery, with the tops shiny dark green and the bottoms pale gray and very tightly tomentose, simple and typically flattish with bony-opaque margins, with a length of .75 - 6 inches (2 – 15 cm) and a width of .4 - 2 inches (1 – 5 cm), borne alternately.
 The male flowers are green hanging catkins with lengths of 3 - 4 inches (7.5 –10 cm).
 The acorns are small, .4 - 1 inch (1 - 2.5 cm), oblong in shape (ovoid or oblong-ellipsoid), shiny and tan-brown to nearly black, often black at the tips, and borne singly or in clusters.

Depending on the growing conditions, live oaks vary from a shrub-size to large and spreading tree-size: typical open-grown trees reach 20 meters (65.5 feet) in height, with a limb spread of nearly 27 meters (88.5 feet).
Their lower limbs often sweep down towards the ground before curving up again.
They can grow at severe angles, and Native Americans used to bend saplings over so that they would grow at extreme angles, to serve as trail markers.

The branches frequently support other plant species such as rounded clumps of ball moss (Tillandsia recurvata), thick drapings of Spanish moss (Tillandsia usneoides), resurrection fern (Pleopeltis polypodioides), and parasitic mistletoe.

The southern live oak has a deep tap-root that anchors it when young and eventually develops into an extensive and widespread root system.
 This, along with its low center of gravity and other factors, makes the southern live oak extremely resistant to strong sustained winds, such as those seen in hurricanes.

The southern live oak responds "with vigorous growth to plentiful moisture on well-drained soil."
They tend to survive fire, because often a fire will not reach their crowns.
Even if a tree is burned, its crowns and roots usually survive the fire and sprout vigorously.
Furthermore, live oak forests discourage entry of fire from adjacent communities because they provide dense cover that discourages the growth of a flammable understory.
They can withstand occasional floods and hurricanes, and are resistant to salt spray and moderate soil salinity.
 Although they grow best in well-drained sandy soils and loams, they will also grow in clay.
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 summer. A live oak's defoliation may occur sooner in marginal climates or in dry or cold winters.
The bark is dark, thick, and furrowed longitudinally.  The leaves are stiff and leathery, with the tops shiny dark green and the bottoms pale gray and very tightly tomentose, simple and typically flattish with bony-opaque margins, with a length of .75 - 6 inches (2 – 15 cm) and a width of .4 - 2 inches (1 – 5 cm), borne alternately.  The male flowers are green hanging catkins with lengths of 3 - 4 inches (7.5 –10 cm).  The acorns are small, .4 - 1 inch (1 - 2.5 cm), oblong in shape (ovoid or oblong-ellipsoid), shiny and tan-brown to nearly black, often black at the tips, and borne singly or in clusters.
Depending on the growing conditions, live oaks vary from a shrub-size to large and spreading tree-size: typical open-grown trees reach 20 meters (65.5 feet) in height, with a limb spread of nearly 27 meters (88.5 feet). Their lower limbs often sweep down towards the ground before curving up again. They can grow at severe angles, and Native Americans used to bend saplings over so that they would grow at extreme angles, to serve as trail markers.
The branches frequently support other plant species such as rounded clumps of ball moss (Tillandsia recurvata), thick drapings of Spanish moss (Tillandsia usneoides), resurrection fern (Pleopeltis polypodioides), and parasitic mistletoe.
The southern live oak has a deep tap-root that anchors it when young and eventually develops into an extensive and widespread root system.  This, along with its low center of gravity and other factors, makes the southern live oak extremely resistant to strong sustained winds, such as those seen in hurricanes.
The southern live oak responds "with vigorous growth to plentiful moisture on well-drained soil." They tend to survive fire, because often a fire will not reach their crowns. Even if a tree is burned, its crowns and roots usually survive the fire and sprout vigorously. Furthermore, live oak forests discourage entry of fire from adjacent communities because they provide dense cover that discourages the growth of a flammable understory. They can withstand occasional floods and hurricanes, and are resistant to salt spray and moderate soil salinity.  Although they grow best in well-drained sandy soils and loams, they will also grow in clay.
Quercus virginiana