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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 Blooms on Mount Diablo in April
Common Name Common Name Common Name Common Name
Alkali Heliotrope Bee Plant Bitter Root Calf Lotus, California Lotus
Arroyo Lupine Bicolored Linanthus, True Babystars Blue Dicks (white form) California Broom, Deer Weed
Baby Blue Eyes Brewer's Calandrinia Blue Elderberry California Bur Clover
Bird's Eye Gilia Brewer's Rockcress Blue-eyed Grass (white form) California Butterweed, Rayless Ragwort
Black Sage California Milkweed Blue-eyed Mary (white form), Few-flowered Collinsia California Poppy
Blue Chick Lupine, Chick Lupine Candy Stripe, Claytonia Brush Morning Glory, Climbing Morning Glory Chaparral Clematis, Old Man's Beard
Blue Dicks Canyon Clarkia, Elegant Clarkia Buck Brush Checker Lily, Mission Bells
Blue False Gilia Clasping Henbit, Henbit California Blackberry Climbing Bedstraw
Blue Skullcap Cobweb Thistle, Venus Thistle California Cotton Rose, California Fluffweed Clustered Broomrape
Blue Witch, Nightshade Colonial Onion, Single-leaf Onion California Dwarf Plantain Colchita
Blue-eyed Grass Cut-leaf Geranium California Saxifrage Common Monkeyflower, Seep Monkeyflower
Blue-eyed Mary, Spinster's Blue Eyed Mary Dwarf Sack Clover Cow Parsnip, Giant Hogweed Cream Cups
Brewer's Phacelia False Babystars Douglas Sandwort, Douglas' Stitchwort Cream Sacs
California Gilia Foothill Meadow Rue Fern Phacelia Fendler's meadow-rue
Chaparral Broomrape, Tuberous Broomrape Fuchsia Flowering Gooseberry Fremont Star Lily, Star Zigadene Fiddleneck, Small-flowered
Chaparral Penstemon, Foothill Penstemon Giant Trillium Goosegrass Bedstraw Globe Lily, Mount Diablo Fairy Lantern, Mount Diablo Globe Tulip
Chicory Greenstem Filaree, White Stem Filaree Hill Cress Golden Eardrops
Chinese Houses Indian Paintbrush Hill Star Goldfields
Common Jewelflower, Most Beautiful Jewelflower Indian Warrior Hopbush,Western Hoptree Great Valley Gumplant, Gumplant, Gumweed
Dove Lupine Lesser Herb Robert Lacepod, Hairy Fringepod Gumweed, Slender Madia
Greater Periwinkle Long Spurred Plectritis Man Root, Wild Cucumber Harlequin Flower
Hillside Pea, Pacifc Pea, Woodland Pea Musky Storksbill Milk Maid, Tooth Wort Hartweg's Tauschia
Ithuriel's Spear, Grass Nut Owl's Clover, Purple Owl's Clover Miner's Lettuce Hedge Mustard
Jim Brush Red Larkspur, Orange Larkspur Mount Diablo Phacelia Johnny Jump-Up
Kellogg's Snapdragon Red Maids Oakland Star Tulip Lace Parsnip, Hog Fennel
Mount Diablo Jewel Flower Red Sand-spurry, Small-flower Catchfly Pitcher Sage Mount Diablo Sunflower
Naked Broomerape, Ghost pipe Red Stem Filaree Poison Hemlock Mountain Mahogany
Ookow, Field Brodiaea, Fork-toothed Ookow Serrated Onion Popcorn Flower, White Forget-me-nots, Foothill Snowdrops Mountain Violet
Padre's Shooting Star, Shooting Star Short Spurred Plectritis Rattlesnake Weed, Wild Carrot Mule's Ears
Purplespot Gilia, Grassland Gilia Slender Phlox, Annual Phlox Shepherd's Needle Mustards
Royal Larkspur Snowberry Shepherd's Purse Narrowleaf Bush Sunflower, Interior Goldenbush, Narrow-leaf Goldenbush, Shrubby Yellow Aster
Seaside Heliotrope Spring Vetch Spring Whitlow Grass Narrowleaf Mule Ears
      Oregon Sunshine, Woolly Sunflower
Silver Bush Lupine, Silver Lupine Whisker Brush Sticky Mouse-ear Chickweed Pineapple Weed
Small California Gilia White-Stem Filaree, Greenstem Filaree White Brodiaea Poison Oak
Spreading Larkspur Windmill Pink, Small-Flower Catchfly White Nemophila Radish, Wild Radish
Spreading Phacelia Winter Vetch Woodland Star Rock Sanicle
Tomcat Clover Woolly Paintbrush, Woolly Painted Cup Woolly-Tuft Malacothrix Sacramento Valley Buttercup
  Yarrow Scarlet Pimpernel
    Yerba Santa Sheep Parsnip
      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
      Yellow Oxalis, Creeping Sorrel
      Yellow Salsify



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