Oenothera genus --- Evening-primrose family
prairie evening primrose (Oenothera albicaulis) -- in May -- Pawnee National Grassland, CO white & cream CO-G
prairie evening primrose (Oenothera albicaulis) -- in May -- Canyons of the Ancients National Monument, CO
common evening primrose (Oenothera biennis) -- in July -- Modoc National Forest, CA yellow & orange OR-S
short-fruit evening primrose (Oenothera brachycarpa) in April -- Chihuahuan Desert Nature Center, TX yellow & orange TX-W
stemless evening primrose (Oenothera caespitosa) -- in May -- Well Gulch Nature Trail, Lory State Park, CO white & cream
stemless evening primrose (Oenothera caespitosa) -- in May -- Pawnee National Grassland, CO white & cream CO-G
tufted evening primrose (Oenothera caespitosa var. marginata) -- in April -- near Carrizozo, New Mexico white & cream NM-S
stemless evening primrose (Oenothera caespitosa) -- in May -- Lory State Park, CO CO-LSP
stemless evening primrose (Oenothera caespitosa) -- in June -- Sand Creek, WY
stemless evening primrose (Oenothera caespitosa) -- in April -- Arches National Park, UT
Coloraado beeblossom (Oenothera coloradensis) -- in August -- Orchard Cove Trail, Lory State Park, CO white & cream CO-LSP
Colorado beeblossom (Oenothera coloradensis) -- in July -- Sportsman Lake Road, near Tie Siding, WY WY-S
20x magnification
cutleaf evening primrose (Oenothera coronopifolia) -- in July -- Gateway, a Fort Collins NA, Poudre Canyon, Larimer County, CO
cutleaf evening primrose (Oenothera coronopifolia) -- in August -- Sand Creek National Landmark, WY white & cream WY-S
cutleaf evening primrose (Oenothera coronopifolia) -- in May -- South Valley Loop Trail, Lory State Park, CO CO-LSP
velvetweed (Oenothera curtiflora) -- in August -- Prospect Ponds/ CSU ELC, Fort Collins, CO
birdcage evening primrose (Oenothera deltoides) -- in March -- Milpitas Wash Road, CA white & cream CA-S
birdcage evening primrose (Oenothera deltoides) -- in July -- off of I-70, northern Utah white & cream
Hartweg's sundrops (Oenothera hartwegii) -- in April -- Big Bend National Park, Texas yellow & orange TX-BB
Hartweg's sundrops (Oenothera hartwegii) -- in April -- Chihuahuan Desert Nature Center, TX TX-W
Howard's evening-primrose (Oenothera howardii) -- in May -- Neva Road/ 36, Boulder County, CO yellow & orange
Howard's evening primrose (Oenothera howardii) -- in May -- Crain High Plains Prairie, Boulder County, CO
cutleaved evening primrose (Oenothera laciniata) -- in April -- western Texas yellow & orange TX-W
lavenderleaf sundrops (Oenothera lavandulifolia) -- in May -- Pawnee Buttes, Pawnee National Grassland, CO yellow & orange CO-G
lavenderleaf sundrops (Oenothera lavandulifolia) -- in June -- South Republican SWA, Yuma County, CO
lavenderleaf sundrops (Oenothera lavandulifolia) -- in May -- Canyons of the Ancients National Monument, CO
Nuttall's evening primrose (Oenothera nuttallii) -- in July -- Young Gulch, Poudre Canyon, Larimer County, CO
Nuttall's evening primrose (Oenothera nuttallii) -- in August -- Eagle's Nest Open Space, Larimer County, CO
pale evening primrose (Oenothera pallida ssp. latifolia) -- in May -- San Juan County, Utah white & cream
pale evening primrose (Oenothera pallida) -- in April -- Arches National Park, UT
desert evening primrose (Oenothera primiveris) -- in April -- Organ Mountains-Desert Peaks, NM yellow & orange
dainty sundrops (Oenothera serrulata) -- in June -- South Valley Loop Trail, Lory State Park, CO yellow & orange CO-LSP
dainty sundrops (Oenothera serrulata) -- in June -- South Republican SWA, Yuma County, CO
scarlet beeblossom (Oenothera suffrutescens) -- in May -- Neva Road/36, Boulder County, Co
scarlet beeblossom (Oenothera suffrutescens) -- in April -- western Texas white & cream TX-W
hairy evening primrose (Oenothera villosa var. strigosa) -- in August -- Rocky Mountain National Park, CO CO-RMNP
hairy evening primrose (Oenothera villosa var. villosa) -- in July -- Lory State Park, CO yellow & orange CO-LSP
hairy evening primrose (Oenothera villosa var. villosa) -- in September -- Buckhorn Canyon, Larimer County Foothills, CO
hairy evening primrose (Oenothera villosa) -- in February -- River's Edge Natural Area, Fort Collins, CO