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iNat·49009SpeciesPlantae10,394 field observations
  1. Plants
  2. ›Vascular Plants
  3. ›flowering plants
  4. ›Dicots
  5. ›beeches, oaks, walnuts, and allies
  6. ›beech family
  7. ›Quercus
  8. ›Quercus
  9. ›Quercus
  10. ›Dumosae
  11. ›Quercus dumosa
blue oak
Plate 1 of 10. (c) sweiser, some rights reserved (CC BY-NC) · via iNaturalist

blue oak

Quercus douglasii

Quercus douglasii, known as blue oak, is a species of oak endemic to (found only in) California, common in the Coast Ranges and foothills of the Sierra Nevada. It is occasionally known as mountain oak and iron oak.

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Where it lives

Recorded sightings

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geo-referenced records in GBIF, from museums, herbaria and field observers.

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In the old herbals & bestiaries

blue oak in Selected Illustrations of Plants Collected in Japan

Selected Illustrations of Plants Collected in Japan

Engelbert Kaempfer · 1712 · p.49

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In the stacks

Searching the stacks…

Every page naming Quercus douglasii in the Biodiversity Heritage Library →

This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 49009.