East Bay Native Plant Species Find out more about some of the native plant species of Alameda and Contra Costa counties. Search for: Show All Species Elegant tarweed (Madia elegans). Photo by Glen Schneider.Antioch Dunes evening primrose (Oenothera deltoides ssp. howellii) at Antioch Dunes National Wildlife Refuge. Photo by James Gorham, CC BY-NC 4.0.Fragrant fritillaries (Fritillaria liliaceae)Pallid manzanita (Arctostaphylos pallida) and brittleleaf manzanita (A. crustacea) grow in the rocky soil of a manzanita barren at Huckleberry Preserve.