Quercus robur | Quercus ilex | Quercus petraea | Quercus alba | Quercus cerris | Quercus virginiana | Quercus rubra | Quercus garryana | Quercus acutissima | Quercus palustris | Quercus minima | Quercus fusiformis | Quercus castaneifolia | Quercus agrifolia | Dermacentor variabilis | Tramitichromis variabilis | Tillandsia variabilis | sand live oak (''Quercus geminata'') | Quercus × warei | ''Quercus'' × ''warei'' | Quercus suber | ''Quercus robur'' | Quercus peninsularis | Quercus lusitanica | Quercus lobata | Quercus laceyi | Quercus ilicifolia | Quercus hemisphaerica | Quercus havardii | Quercus glauca |
Oaks - native oaks including red (Quercus rubra), white (Quercus alba), black (Quercus velutina), bur (Quercus macrocarpa), shingle (Quercus imbricaria), and swamp white (Quercus bicolor), as well as three Asian oaks representing sawtooth oak (Quercus acutissima) and oriental oak (Quercus variabilis).
The low-elevation forests of the foothills are dominated by temperate deciduous trees like oaks (Quercus acutissima, Q. variabilis), elm (Ulmus spp.), Common Walnut (Juglans regia), maple (Acer spp.), ash (Fraxinus spp.) and Celtis spp.