California Oaks

Explore California's 33 native oak species with interactive range maps, detailed field guide info, and a community where you can contribute range map improvements.

California Oaks is the most comprehensive guide to California's native oak species. California Oaks is featuring detailed species profiles, interactive range maps, and a community-driven platform for improving distribution data.

EXPLORE ALL CALIFORNIA OAKS Browse 33 native oak species plus their hybrids and varieties. Each species profile includes: • Common and scientific names with taxonomic section • Detailed descriptions of leaves, acorns, and bark • Growth form, height range, and elevation range • Habitat preferences and conservation status • Photo gallery • Related species, hybrids, and varieties

POWERFUL SEARCH & FILTERING • Search by common name, scientific name, habitat, or description • Filter by taxonomic section (Lobatae, Quercus, Protobalanus) • Sort by name, growth form, section, size, or favorites • Toggle visibility of hybrids and varieties • Save your favorite species for quick access

INTERACTIVE RANGE MAPS • View color-coded distribution maps for every species • Overlay multiple species to compare ranges • Tap anywhere on the map to identify which oaks grow at that location • Switch between Standard, Satellite, and Hybrid map styles • Individual occurrence points shown alongside range polygons

COMMUNITY MAP EDITING • Suggest improvements to species range maps using an interactive polygon editor • Add, move, and delete boundary points with precision controls • Save drafts locally and submit when ready • Browse and vote on community submissions • Comment on other users' range map edits • View your submission history and moderator feedback

BUILT FOR THE FIELD • Clean, intuitive interface designed for quick reference outdoors • Detailed botanical descriptions to help with identification • Sources cited from Jepson Flora Project, iNaturalist, and published literature