Aster subfamily 3.3 (Asteraceae) -- disk and yellow rays -- genus p to R
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)
wooly groundsel (Packera cana) -- in April -- Rabbit Mountain Open Space, Boulder County, CO
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wooly groundsel (Packera cana) -- in July -- Mount Evans, Clear Creek County, CO
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wooly groundsel (Packera cana) -- in May -- Pawnee National Grassland, CO
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wooly groundsel (Packera cana) -- in June -- Sportsman Lake Road, southern Wyoming
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wooly groundsel (Packera cana) -- in June -- Sportsman Lake Road, southern Wyoming
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wooly groundsel (Packera cana) -- in June -- Lower Dadd Gulch, Poudre Canyon, Larimer County, CO
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splitleaf groundsel (Packera dimorphophylla) -- in July -- Old Fall River Road, Rocky Mountain NP, CO
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Fendler's ragwort (Packera fendleri) -- in May -- Pawnee National Grassland, CO
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Fendler's ragwort (Packera fendleri) -- in May -- Lory State Park, CO
Fendler's ragwort (Packera fendleri) -- in June -- Rawah Wilderness, Larimer County, CO
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Fendler's ragwort (Packera fendleri) -- Bridal Veil Falls Trail, RMNP, CO
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lobeleaf groundsel (Packera multilobata) -- in May -- Yampa Bench Rd, Dinosaur National Monument, CO
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New Mexico groundsel (Packera neomexicana) -- in April -- Cibola National Forest near Corona, southern New Mexico
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roundleaf ragwort (Packera obovata) -- in April -- Great Smoky Mountains National Park, TN
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prairie groundsel (Packera plattensis) -- in May -- Lory State Park, CO
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prairie groundsel (Packera plattensis) --in April -- Arthur's Rock Trail, Lory State Park, CO
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prairie groundsel (Packera plattensis) -- in May -- South Valley Loop Trail, Lory State Park, CO
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falsegold groundsel (Packera pseudaurea var. pseudaurea) -- in July -- Yellowstone National Park, WY
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threetooth ragwort (Packera tridenticulata) -- in May -- Pawnee National Grassland, CO
hoary groundsel (Packera werneriifolia) -- in May -- Trail Ridge Road, Rocky Mountain National Park, CO
hoary groundsel (Packera werneriifolia) -- in July -- Hoosier Ridge, Summit County, CO
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hoary groundsel (Packera werneriifolia) -- in July -- Long Draw Road, Larimer County montane, CO
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lemonscent (Pectis angustifolia) -- in April -- Big Bend Ranch State Park, TX
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oppositeleaf bahia (Picradeniopsis oppositifolia) -- in July -- Soapstone Prairie Natural Area, Fort Collins, CO
oppositeleaf bahia (Picradeniopsis oppositifolia) -- in August -- Sportsman Lake Road, southern Wyoming
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oppositeleaf bahia (Picradeniopsis oppositifolia) -- in August -- Hutton Lake National Wildlife Refuge, southern Wyoming
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basindaisy (Platyschkuhria integrifolia) -- in September -- rt. 128 north of Moab, southern Utah
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basindaisy (Platyschkuhria integrifolia) -- in September -- Lincoln National Forest, NM
greenstem paperflower (Psilostrophe sparsiflora) -- in September -- Villanueva State Park, NM
wooly paperflower (Psilostrophe tagetina) -- in July -- Bosque del Apache National Wildlife Refuge, NM
wooly paperflower (Psilostrophe tagetina) -- in April -- Big Bend Ranch SP, TX
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plains paperflower (Psilostrophe villosa) -- in April -- River Road East, Big Bend National Park, Texas
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curlyhead goldenweed (Pyrrocama crocea var. crocea) -- in June -- Schofield Pass Road, Gunnison County, CO
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prairie coneflower (Ratibida columnifera) -- in July -- Sand Creek, WY
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prairie coneflower (Ratibida columnifera) -- in June -- Coyote Ridge, Fort Collins Natural Area, CO
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prairie coneflower (Ratibida columnifera) -- in June -- Bluff Lake Nature Center, Denver Area, CO
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cutleaf coneflower (Rudbeckia laciniata var. ampla) -- in July -- Sand Creek National Landmark, CO
cutleaf coneflower (Rudbeckia laciniata var. ampla) -- in July -- Cherokee Park State Wildlife Area, Roosevelt National Forest, CO
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cutleaf coneflower (Rudbeckia laciniata var. ampla) -- in July -- North Fork Trail, Big Thompson Canyon, Larimer County, CO
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cutleaf coneflower (Rudbeckia laciniata var. ampla) -- San Isabel National Forest, CO
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black-eyed Susan (Rudbeckia hirta var. hirta) -- in July -- Sand Creek National Landmark, WY
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black-eyed Susan (Rudbeckia hirta var. hirta) -- in July -- Parvin Lake State Wildlife Area, CO
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black-eyed Susan (Rudbeckia hirta var. hirta) -- in July -- Rollins Pass Road, Gilpin County, CO
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