The photos in this wildflower identification guide are intended to help you identify the wildflowers that you may see in Mount Diablo State Park throughout the blooming season. The photos were taken by volunteers and do not necessarily include specific features necessary to identify the flowers.
Select a color category. The color of the flower is sometimes difficult to classify for a variety of reasons (such as lighting, camera used, or device used to view the picture), so if you don't find the flower in one color category, try another. The wildflowers are then listed in alphabetical order by common name of the plant. Some plants are known by more than one common name, so be sure to check them all if you are seeking a specific name. Don't forget to click the picture to get a closer look!
Typical bloom months are also listed. Bloom dates vary from year to year depending on the weather. The same plant may bloom at different times, depending on its location and elevation.
Check out What's Blooming Now on Mount Diablo. This list is maintained by Steve Beatty and Steve Smith, along with our many “Flower Finders” roaming the mountain.
Some additional resources:
The Flowering Plants and Ferns of Mount Diablo California, Barbara Ertter and Mary L. Bowerman, 2002
Plants of the San Francisco Bay Region, Mendocino to Monterey, 3rd edition, Linda H. Beidleman and Eugene N. Kozloff, 2014
The Jepson Manual, Vascular Plants of California, 2nd edition, edited by Bruce G. Baldwin, Douglas Goldman, David J. Keil, Robert Patterson, Thomas J. Rosatti, and Dieter Wilken, 2012
Spring Wildflowers of Henry W. Coe State Park and the Inland San Francisco Bay Area, Barry Breckling, 2008
Plants of the East Bay Parks, Glenn Keator, 1994
Mount Diablo Wildflowers booklet, Mount Diablo Interpretive Association, 2006
Jepson eflora: ucjeps.berkeley.edu/eflora/
This guide is a work in progress, conceived and maintained by volunteers. If you have questions or comments about the contents of the guide, please email