Taxon  Report   6990 
Quercus douglasii  Hook. & Arn.
Blue oak
Quercus douglasii
© 2003 Joseph Dougherty/
Click on a photo to see it bigger.
Quercus douglasii
© 2007 Neal Kramer
Quercus douglasii, a dicot, is a tree that is native to California and is endemic (limited) to California.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Quercus douglasii
© 1995 Saint Mary's College of California
Family: FAGACEAE  
Genus: Quercus
Foothill Woodland
Toxicity: MINOR, DERMATITIS (ACORNS)   [California Poison Control System 2010]    
Name Status:
Accepted by TJM2 + PLANTS + JM93
More information about  Quercus douglasii
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Photos on CalPhotos / Google Images
Photos and ID tips from

Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation,
with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria.
[web application]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Oct 22, 2016).

The information on this page comes from diverse sources. None of the links are sponsored.