Quercus chrysolepis var. palmeri (Engelm.) Engelm.
Quercus dunnii Kellogg ex Curran
Quercus palmeri is a species of oak known by the common name Palmer oak, or Palmer's oak. It is native to California (as far north as populations just south and east of the San Francisco Bay), Baja California, Southern Nevada, and in Arizona through the transition zone to the eastern Mogollon Rim, where it grows in canyons, mountain slopes, washes, and other dry habitats.[3][4][5]
Description
Quercus palmeri is a shrub or small tree growing 2–6 m (6 ft 7 in – 19 ft 8 in) in height. It branches into angular twigs and is reddish brown. The leaves are 1 to 3 centimetres (3⁄8 to 1+1⁄8 inches) in length. They are stiff, leathery, and brittle, their edges wavy with sharp spine-teeth. The upper surface is shiny, waxy, and olive green in color, the lower gray-green and coated with glandular hairs. The fruit is an acorn with a hairy cap up to 2.5 cm (1 in) wide and a blunt-ended nut 2 to 3 cm (3⁄4 to 1+1⁄4 in) long.[4]
Quercus dunnii Kellogg, common name Dunn oak, is synonymous with Palmer oak. Palmer oak does not occur in New Mexico; the specimens were misidentified and later corrected to Quercus grisea, per SEINet. Per FNA, the population of golden oaks in eastern Arizona appear to be introgressed Quercus chrysolepis and Q. palmeri, best called Q. chrysolepis aff. Q. palmeri. These populations of Q. chrysolepis demonstrate historical hybridization between Q. chrysolepis and Q. palmeri.[8]Quercus palmeri was recently discovered in Southern Nevada in Christmas tree pass that was previously only know from fossils.[9]
