Symphyotrichum genus --- aster subfamily 2.2  

western aster (Symphyotrichum ascendens) -- in August -- Sportsman Lake Road, WY      blue & purple    

western aster (Symphyotrichum ascendens) -- in August -- Deadman Road, Red Feather Lakes Area, CO

western aster (Symphyotrichum ascendens) -- in August -- Hermit Park Open Space, Larimer County, CO

western aster (Symphyotrichum ascendens) -- in August -- Mount Zirkel Wilderness, Jackson County, CO

northern bog aster (Symphyotrichum boreale) -- in July -- High Creek Fen Preserve, Park County, CO   white & cream ​

western meadow aster (Symphyotrichum campestre) -- in August -- Michigan Ditch Trail, Colorado State Forest SP   blue & purple  ​ 

white heath aster (Symphyotrichum ericoides) -- in September -- Soldier Canyon, Lory State Park, CO        white & cream     

white heath aster (Symphyotrichum ericoides) -- in September -- Reservoir Ridge, Fort Collins Natural Area, CO

white heath aster (Symphyotrichum ericoides) -- in September -- near irrigation canal, Fort Collins, CO

white prairie aster (Symphyotrichum falcatum) -- in July -- Gateway, a Fort Collins Natural Area, Poudre Canyon, CO

white prairie aster (Symphyotrichum falcatum) -- in September -- Lory State Park, CO       white & cream         

white prairie aster (Symphyotrichum falcatum) -- in September -- Cloudcroft, Lincoln National Forest, NM  white & cream   

white prairie aster (Symphyotrichum falcatum) -- in August -- Well Gulch Nature Trail, Lory State Park, CO

Fendler's aster (Symphyotrichum fendleri) -- in September -- Well Gulch Nature Trail, Lory State Park, CO     blue & purple  ​

alpine leafybract aster (Symphyotrichum foliaceum) -- in July -- Snowy Range, Medicine Bow National Forest, WY    blue & purple   

alpine leafybract aster (Symphyotrichum foliaceum) -- in July -- Zimmerman Lake Trail, Larimer County, CO

Canby's aster (Symphyotrichum foliaceum var. canbyi) -- in July -- Buffalo Pass Road, Jackson County, CO    red & pink 

Parry's aster (Symphyotrichum foliaceum var. parryi) --- Shoshone National Forest, Fremont Co, WY   ​red & pink

Parry's aster (Symphyotrichum foliaceum var. parryi) -- in September -- Marshall Pass Road, Chaffee County, CO

smooth blue aster (Symphyotrichum laeve) -- in August -- Colorado Forest State Park, CO    blue & purple    

smooth blue aster (Symphyotrichum laeve var. geyeri) -- in September -- Watson Lake, State Wildlife Area, Larimer County, CO

smooth blue aster (Symphoritrichum laeve var. geyeri) -- in August -- Well Gulch Nature Trail, Lory State Park, CO

white panicle aster (Symphyotrichum lanceolatum) -- in August -- Sportsman Lake Road, southern Wyoming   white & cream   

white panicle aster (Symphyotrichum lanceolatum ssp. hesperium) -- in August -- Ramsay-Shockey Open Space, CO  

white panicle aster (Symphyotrichum lanceolatum) -- in September -- Parvin Lake, State Wildlife Area, Larimer County, CO

white panicle aster (Symphyotrichum lanceolatum ssp. hesperium) -- in October -- Old Flowers Road, Larimer County, CO

New England aster (Symphyotrichum novae-angliae) -- in August -- Daniel's Pass, Uinta National Forest, northern Utah ​   blue & purple    

​New England aster (Symphyotrichum novae-angliae) -- in July -- Buffalo Pass Road, Jackson County, CO

smooth white aster (Symphyotrichum porteri) -- in August -- Arthur's Rock Trail, Lory State Park      white & cream      CO-F     ART-LSP

smooth white aster (Symphyotrichum porteri) -- in September -- Arthur's Rock Trail, Lory State Park, CO

                      20x magnification                                                                                              20x magnification

western mountain aster (Symphyotrichum spathulatum) -- in September -- Buckhorn Canyon, Larimer County, CO

western mountain aster (Symphyotrichum spathulatum) -- in September -- Greyrock Trail, Poudre Canyon, Larimer County, CO