One Two Tree
California Black Oak illustration

California Black Oak

Quercus kelloggii

California black oak's deeply lobed leaves end in sharp, bristle-tipped points — a telltale sign of the red oak group, distinct from the rounded lobes of Oregon white oak. Its acorns were once a dietary staple, ground into meal by many tribes of the region.

Where found

Dry mixed-conifer and oak woodlands of southern Oregon and the Klamath-Siskiyou region.

Fun facts

  • Bristle-tipped lobes place it in the red oak group, unlike Oregon white oak's rounded lobes.
  • Acorns were leached of bitter tannins and ground into meal, a staple food for many Indigenous peoples of the region.
  • Fall color turns a deep gold-brown before leaves drop.

Specs

California Black Oak specifications
Height10–25 m
Spread10–15 m
Lifespan150–500 yrs
Growth RateModerate
SunFull sun
Native RangeSouthern Oregon to Baja California, mostly in the Klamath and Sierra ranges