chylismia genus -- evening primrose family

golden suncup (Chylismia brevipes) -- in March -- Palo Verde, southern California          yellow & orange      

golden suncup (Chylismia brevipes) -- in March -- U.S. 95 in southern Nevada     

golden suncup (Chylismia brevipes) -- in March -- Death Valley National Park, CA   

brown-eyed primrose (Chylismia claviformis ssp. claviformis) -- in July -- Yosemite National Park, CA   white & cream  

brown-eyed primrose (Chylismia claviformis ssp. claviformis) -- in March -- Death Valley National Park, CA    white & cream  

Peirson's brown-eyed primrose (Chylismia claviformis var. peirsonii) -- in March --  Organ Pipe Cactus NM, AZ   white & cream