| . | Tree Oaks of California (deciduous, with lobed leaves) | |||
|---|---|---|---|---|
| . | Leaves | Acorns | Bark | General |
| species | Leaf margins entire, slightly lobed or wavy; semi-deciduous | |||
| Engelmann oak Q. Engelmanii | flat concolorous oblong/obovate | puberulent within scales tomentose, upper ciliate 1st year | light, scaly; twigs tomentose | South, spring deciduous; hybrids: x lobata, and x dumosa |
| Blue oak Q. Douglasii | bluegreen above, paler, pubescent below | cups shallow, scales with small warts 1st year | shallowly checked into small thin scales; young twigs tomentose | slopes bordering interior valleys; drought, winter deciduous; local |
| species | Leaf margins deeply lobed; deciduous | |||
| Black oak Q. Kelloggii | lobes pointed with soft bristle | tomentose on inner surface thin, close scales 2nd year | dark grey, smooth | summits, north slopes, local mts. |
| Valley oak Q. lobata | lobes rounded, lacking bristles dull green above | long-conical lower scales warty cup deeply hemispheric 1st year | thick, cuboidal, checked | largest US oak several named varieties widespread, local |
| Oregon oak Q. Garryana | lobes rounded, lacking bristles shiny green above | ovoid, short, stout scales warty, hairy cup puberulent within 1st year | thin white scaly young twigs red pubescent | ridges, north slopes local mts., north var. breweri; hybrids x dumosa |
| species | Tree Oaks of California (evergreen, leaves never lobed) | |||
| Interior live oak Q. Wislizenii | leaves flat spiny or entire, slightly bicolored oblong to lanceolate | young cup with papery, ciliate scales often w/longitudinal bands; 2nd year | dark, smooth | summits local mts. Cuyama canyon shrub variety: Q. parvula (Greene) = var. frutescens |
| Canyon oak Q. chrysolepsis | leaves flat, spiny or entire, pale, hairy below pendulous branches | young cup with golden thick, corky, hairy scales silky within 2nd year | light gray, smooth, scaley; young twigs hoary tomentose | widespread, variable maul, goldcup oak local summits, Lopez canyon, SLO streets |
| Coast live oak Q. agrifolia | leaves convex, oval, w/spines/bristles brown, stellate hair tufts below in midrib axils | slender, pointed, silky within; scales brown, thin, puberulent, ciliate 1st year | dark, smooth | coast ranges, local, SLO varieties and hybrids with Q. kelloggii: var. fructescens, var. oxyadenia, Q. x Ganderi |
| . | Other Oaks (Island oak, Tanbark oak, shrub oaks, hybrids) (20 hybrids, 11 named) | |||
|
Tanbark oak Lithocarpus densiflora wooded slopes, coast ranges, north | Scrub oak Q. dumosa, Q. berberidifolia Q. turbinella Q. MacDonaldii | Shreve oak Q. parvula tree form of Q. dumosa? coast ranges | Leather oak Q. durata on serpentine, local hybrids x dumosa | Island oak Q. tomentella parallel veins toothed, hairy below Channel Ils., MBay, SLO |
| Palmer oak Holly leaved oak Q. Palmeri, Q. Dunnii 3k-5k feet | Deer oak Q. sadleriana above 3k feet north | Huckleberry oak Q. vaccinifolia rock above 3k feet | Hybrid: Oracle oak Q. x morehus black x interior oak; local | Hybrid: Chase oak Q. x Chasei black x coast live oak; local |
| Data follows Oaks of California, 1995. Bruce M. Pavlik, et al. Cachuma Press. | ||||