The Quercus engelmannii, also known as Engelmann Oak or Pasadena Oak, is a small tree native to Southern California and northwestern Baja California, Mexico. It is generally evergreen, but may be drought-deciduous during the hot, dry summers. The tree has a rounded or elliptical canopy, and its bark is thick, furrowed, and light gray-brown. The leaves are leathery, blue-green and may be flat or wavy, with smooth margins. The flowers are catkins, and the fruit is an acorn maturing six to eight months after pollination. While the wood is strong, it tends to warp and split upon drying and has low value as timber. This plant is considered to be the northernmost species of subtropical oak and is related to Arizona white oak and Mexican blue oak. The largest remaining stands of Engelmann Oaks are on the Santa Rosa Plateau and Black Mountain. Plant this tree in well-draining soil and full sun exposure.
