Gutierrezia genus --- aster subfamily 3.2
Aster 3.1 (Genus A to F) -- Aster 3.2 (Genus G to O) -- Aster 3.3 (Genus P to R) -- Aster 3.4 (Genus S to Z)
threadleaf snakeweed (Gutierrezia microcephala) -- in September -- White Sands National Monument, NM NM-S
broom snakeweed (Gutierrezia sarothrae) -- in August -- Orchard Cove Trail, Lory State Park, CO CO-LSP
broom snakeweed (Gutierrezia sarothrae) -- in August -- Soapstone Prairie, Fort Collins Natural Area, CO
broom snakeweed (Gutierrezia sarothrae) -- in August -- Eagle's Nest Open Space, Larimer County, CO