Quercus hypoleucoides A.Camus[

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Quercus hypoleucoides, the silverleaf oak or the whiteleaf oak is a North American species of oak tree or shrub. It grows in the southwestern United States and northern Mexico.

Quercus hypoleucoides, though usually seen as a shrub, can be found to be a full-sized tree, 9 metres (30 feet) tall in areas where it receives sufficient water.

The tree produces its flowers in the spring as most plants do. It grows in warm regions and is used as an ornamental due to its unusual foliage.

• Bark: Is dark gray in color. It is thin with shallow, lighter-colored fissures and narrow ridges.
• Twig: Reddish brown in color and are broadly triangular with a sharp point. Are slender to moderate, generally with white fuzz. The end buds are clustered.
• Leaves: Are alternate, evergreen, simple, and narrowly oblong to lanceolate. They are usually 5–10 centimetres (2 to 4 inches) long, with edges revolute. Occasionally there are a few shallow teeth, a narrow pointed tip, and a leathery texture. They are usually a shiny yellow-green on top and white or silvery on the bottom.
• Fruits: Oblong acorn that is 1.5–2 cm (1⁄2–3⁄4 in) inch long. The cap is scaly bowl-shaped and covers one-third of the nut which ripens in 1 (or 2 seasons), maturing in early fall.
• Flowers: Q. hypoleucoides is a monoecious plant, with both male and female flowers growing on the same plant. This is opposed to dioecious plants where male flowers and female flowers grow on separate trees. The male flowers form long drooping catkins that are yellow-green in color. The female flowers have very small spikes in leaf axils that appear with the leaves.
• Form: Though usually found as a shrub, given enough moisture it can become a medium-sized tree that reaches up to 18 m (60 ft) tall with a spreading round crown.

Q. hypoleucoides can be distinguished from other oaks by its lanceolate leaves which are dark green on top but silver white on the lower surface.

Quercus hypoleucoides - Wikipedia

 

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