Parmeliaceae -- LICHEN FAMILIES
perplexed beard lichen (Usnea perplexans) -- in April -- Buckhorn Canyon, Larimer County, Colorado
tumbleweed lichen (Xanthoparmelia chlorochroa) -- in February -- Eagle's Nest Open Space, Larimer County, CO
Colorado rock-shield lichen (Xanthoparmelia coloradoensis) -- in January -- Gateway Natural Area, Fort Collins, CO
Cumberland xanthoparmelia lichen (Xanthoparmelia cumberlandia) -- in January -- Bellvue, Larimer County Foothills