Quercus robur

English oak, pedunculate oak, Pedunculate Oak

Family: Fagaceae · Type: tree · Not Native

English oak is a naturalized tree found in the southern Santa Cruz Mountains along roadsides, pastures, and forest margins at elevations below 1,000 meters. Flowering from March to April, this deciduous tree produces small, unremarkable flowers typical of oak species. Growing to heights of 30 meters with a light gray, scaly trunk, it develops a spreading canopy characteristic of mature oaks. Its leaves are large, 5 to 15 centimeters long, with deep, rounded lobes and a strongly cordate base, displaying a rich deep to light green color with a shiny surface. The tree produces distinctive acorns in hemispherical cups 13 to 20 millimeters wide, which mature within a single year.

Habitat: Roadsides, pastures, forest margins, woodlands, persisting near old homesites

Bloom period: Mar-Apr

Elevation: < 1000 m

Bioregions: s SnFrB (Santa Cruz Mountains)

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.