| General Description | With an extensive decline in population, this species has been placed on the IUCN Red List as globally threatened. |
| Notable Specimens | Santa Rosa Plateau Reserve, 39400 Clinton Keith Rd, Murrieta, California, United States of America. |
| Habitat | Oak woodlands and slopes at an altitude of 50-1,200 m. |
| Bark/Stem Description | Light grey and furrowed with brown hairy twigs. |
| Flower/Leaf Bud Description | Globose and glabrous, reddish-brown, 1-2 mm. |
| Leaf Description | Oblong or elliptic, thick, blueish-green, glabrous and smooth with a yellowish-green underside, 7-8 secondary veins on either side of the midvein and a cuneate to cordate base, 2.5-7 x 1.2-2.5 cm. |
| Fruit Description | Acorn, elliptic and light grey, singular or paired. Nut ovoid or oblong, light brown, 1.5-2.5 x 1.2-1.4 cm. |