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Wildflower Identification Guide

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Wildflower Identification Guide

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 below. The color of a 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 be in bloom at different times, depending on its location and elevation. The “What Blooms on Mount Diablo” list below lists wildflowers that typically are in bloom during the current month.
What's blooming in Mount Diablo.
Common Name Common Name Common Name Common Name
Arroyo Lupine Bee Plant Bitter Root Blow Wives (flower)
Baby Blue Eyes Brewer's Calandrinia Blow Wives (seed pods) Calf Lotus, California Lotus
Bird's Eye Gilia Brewer's Rockcress Blue Dicks (white form) California Broom, Deer Weed
Black Sage California Milkweed Blue Elderberry California Bur Clover
Blue Chick Lupine, Chick Lupine Candy Stripe, Claytonia Blue-eyed Grass (white form) California Butterweed, Rayless Ragwort
Blue Dicks Canyon Clarkia, Elegant Clarkia Brush Morning Glory, Climbing Morning Glory California Poppy
Blue Skullcap Clasping Henbit, Henbit Buck Brush Chaparral Clematis, Old Man's Beard
Blue Witch, Nightshade Cobweb Thistle, Venus Thistle California Blackberry Checker Lily, Mission Bells
Blue-eyed Grass Colonial Onion, Single-leaf Onion California Cotton Rose, California Fluffweed Clustered Broomrape
Blue-eyed Mary, Spinster's Blue Eyed Mary Cut-leaf Geranium California Dwarf Plantain Colchita
Brewer's Phacelia Dwarf Sack Clover California Saxifrage Common Monkeyflower, Seep Monkeyflower
California Gilia False Babystars Cow Parsnip, Giant Hogweed Cream Cups
Chaparral Broomrape, Tuberous Broomrape Foothill Meadow Rue (male) Douglas Sandwort, Douglas' Stitchwort Cream Sacs
Chaparral Penstemon, Foothill Penstemon Fuchsia Flowering Gooseberry Fern Phacelia Fiddleneck, Small-flowered
Chicory Giant Trillium Fremont Star Lily, Star Zigadene Globe Lily, Mount Diablo Fairy Lantern, Mount Diablo Globe Tulip
Chinese Houses Indian Paintbrush Goosegrass Bedstraw Golden Eardrops
Common Jewelflower, Most Beautiful Jewelflower Indian Warrior Hill Cress Goldfields
Dove Lupine Lesser Herb Robert Hill Star Great Valley Gumplant, Gumplant, Gumweed
Greater Periwinkle Little Spring Beauty Hopbush,Western Hoptree Gumweed, Slender Madia
Hillside Pea, Pacifc Pea, Woodland Pea Long Spurred Plectritis Lacepod, Hairy Fringepod Hartweg's Tauschia, Umbrellawort
Ithuriel's Spear, Grass Nut Musky Storksbill Madrone Tree, Pacific Madrone Johnny Jump-Up
Jim Brush Owl's Clover, Purple Owl's Clover Man Root, Wild Cucumber Lace Parsnip, Hog Fennel
Kellogg's Snapdragon Red Larkspur, Orange Larkspur Milk Maid, Tooth Wort Mount Diablo Sunflower
Mount Diablo Jewel Flower Red Maids Miner's Lettuce Mountain Mahogany
Ookow, Field Brodiaea, Fork-toothed Ookow Red Sand-spurry, Small-flower Catchfly Mount Diablo Phacelia Mountain Violet
Padre's Shooting Star, Shooting Star Redstem Filaree Pitcher Sage Mule's Ears
Purplespot Gilia, Grassland Gilia Serrated Onion Poison Hemlock Mustards
Royal Larkspur Short Spurred Plectritis Popcorn Flower, White Forget-me-nots, Foothill Snowdrops Narrowleaf Bush Sunflower, Interior Goldenbush, Narrow-leaf Goldenbush, Shrubby Yellow Aster
Silver Bush Lupine, Silver Lupine Slender Phlox, Annual Phlox Rattlesnake Weed, Wild Carrot Narrowleaf Mule Ears
Small California Gilia Snowberry Shepherd's Needle Pineapple Weed
Spreading Larkspur Spring Vetch Shepherd's Purse Poison Oak
Spreading Phacelia Whisker Brush Spring Whitlow Grass Radish, Wild Radish
Tomcat Clover Windmill Pink, Small-Flower Catchfly White Brodiaea Rock Sanicle
Winter Vetch White Nemophila Sacramento Valley Buttercup
Woolly Paintbrush, Woolly Painted Cup Woodland Star Scarlet Pimpernel
Woolly-Tuft Malacothrix Sheep Parsnip
Yarrow Silverpuffs
Yerba Santa Skunk Bush, Skunkbush
Sourgrass, Bermuda-buttercup
Spring Gold, Parsnip Bladder, Common Lomatium
Sticky Monkeyflower, Bush Monkeyflower
Tuberous Sanicle, Turkey Pea
Western Wallflower
Whispering Bells
Wind Poppy
Winter Cress
Woodland Woolly Threads
Woolly Paintbrush, Woolly Painted Cup
Yellow Flowered Jewelflower, Yellow California Mustard, Yellow Mustard

Some additional resources:

  • The Flowering Plants and Ferns of Mount Diablo California, Barbara Ertter and Mary L. Bowerman, 2002Plants 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
  • Mt. Diablo Wildflowers booklet, Mount Diablo Interpretive Association, 2005
  • Jepson 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:   captcha