Lactuca genus -- Aster Subfamily 1

Canadian lettuce (Lactuca canadensis) -- in August -- Lefthand Canyon, Boulder, CO    yellow & orange    

Canadian lettuce (Lactuca canadensis)  -- in July -- Gregory Canyon, Boulder County, CO

biannual lettuce (Lactuca ludoviciana) -- in July -- Bellvue, CO    yellow & orange    

​biannual lettuce (Lactuca ludoviciana) -- in August -- Pelican Marsh, Fort Collins Natural Area, Larimer County, CO

prickly lettuce (Lactuca serriola) -- in August -- Eagle's Nest Open Space, Larimer County, CO

prickly lettuce (Lactuca serriola) -- in August -- Well Gulch Nature Trail, Lory State Park, CO    yellow & orange ​       

prickly lettuce (Lactuca serriola) -- in September -- Arthur's Rock Trail, Lory State Park, CO   

blue lettuce (Lactuca tatarica) -- in July --  Sand Creek National Landmark, WY             blue & purple      

blue lettuce (Lactuca tatarica) -- in September -- Lory State Park, CO