Evening-primrose Family (ONAgraceae)
fireweed (Chamaenerion angustifolium) -- in July -- Yosemite National Park, CA red and pink
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fireweed (Chamaenerion angustifolium) -- in August -- Pingree Park, Roosevelt National Forest, CO red and pink
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fireweed (Chamaenerion angustifolium) -- in August -- Yosemite National Park, CA red and pink
fireweed (Chamaenerion angustifolium) -- in September -- Marshall Pass Road, Saguache County, CO
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golden suncup (Chylismia brevipes) -- in March -- Palo Verde, southern California yellow & orange
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golden suncup (Chylismia brevipes) -- in March -- U.S. 95 in southern Nevada
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golden suncup (Chylismia brevipes) -- in March -- Death Valley National Park, CA
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brown-eyed primrose (Chylismia claviformis ssp. claviformis) -- in July -- Yosemite National Park, CA white & cream
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brown-eyed primrose (Chylismia claviformis ssp. claviformis) -- in March -- Death Valley National Park, CA
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Peirson's brown-eyed primrose (Chylismia claviformis var. peirsonii) -- in March -- Organ Pipe Cactus NM, AZ white & cream
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small enchanter's nightshade (Circaea alpina) -- in June -- Well Gulch Nature Trail, Lory State Park, CO white & cream
pinkfairies (Clarkia pulchella) -- in June -- Hells Canyon National Recreation Area, Wallowa-Whitman NF, ID red & pink
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diamond clarkia (Clarkia rhomboidea) -- in July -- Humboldt County, NV red & pink
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diamond clarkia (Clarkia rhomboidea) -- in June -- Steens Mountain Wilderness Area, Oregon
pimpernel willowherb (Epilobium anagallidifolium) -- in July -- Old Fall River Road, Rocky Mountain NP, CO white & cream
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pimpernel willowherb (Epilobium anagallidifolium) -- in July -- Boreas Pass Road, Park County, CO red & pink
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pimpernel willowherb (Epilobium anagallidifolium) -- in July -- Rollins Pass Road, Gilpin County, CO
pimpernel willowherb (Epilobium anagallidifolium) -- in August -- Milner Pass, Rocky Mountain National Park, Larimer Cty., CO
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tall annual willowherb (Epilobium brachycarpum) -- in July -- Floriston, northern California red & pink
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tall annual willowherb (Epilobium brachycarpum) -- in July -- Grand Teton National Park, WY
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tall annual willowherb (Epiolobium brachycarpum) -- in July -- Lava Beds National Monument, CA
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American willowherb (Epilobium ciliatum) -- in July -- Long Draw Road, Larimer County Montane, CO
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American willowherb (Epilobium ciliatum) -- in August -- Deadman Road, Red Feather Lakes Area, CO white & cream
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American willowherb (Epilobium ciliatum) -- in August -- Mount Zirkel Wilderness, Jackson County, CO
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talus willowherb (Epilobium clavatum) -- in July -- Elko County, NV red & pink
glaucous willowherb (Epilobium glaberrimum) -- in July -- near Crescent City, northern California red & pink
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glandular willowherb (Epilobium halleanum) -- in July -- Sand Creek National Landmark, WY white & cream
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glandular willowherb (Epilobium halleanum) -- in July -- Buffalo Pass Road, Jackson County, CO
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hairy willowherb (Epilobium hirsutum) -- in August -- St. Vrain State Park, CO red & pink
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hairy willowherb (Epilobium hirsutum) -- in September -- Big Thompson Ponds State Wildlife Area, CO
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Hornemann's willowherb (Epilobium hornemannii) -- in July -- Routt National Forest, CO red & pink
milkflower willowherb (Epilobium lactiflorum) -- in July -- Sand Creek National Landmark, WY white & cream
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milkflower willowherb (Epilobium lactiflorum) -- in July -- Zimmerman Lake Trail, Larimer County, CO
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bottle washer (Eremothera boothii) -- in March -- Freda, Mojave Desert, southern California white & cream
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narrowleaf suncup (Eremothera refracta) -- in March -- Palm Canyon, Kofa National Wildlife Refuge, AZ white & cream
California suncup (Eulobus californicus) -- in March -- Tonto National Forest, AZ yellow & orange
spreading groundsmoke (Gayophytum diffusum) -- in July -- Cub Lake Trail, Rocky Mountain NP, CO white & cream
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spreading groundsmoke (Gayophytum diffusum) -- in June -- Steens Mountain Wilderness Area, OR
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20x magnification
spreading groundsmoke (Gayophytum diffusum ssp. parviflorum) -- in September -- Bellaire Lake, Red Feather Lakes, Larimer Cty, CO
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pinyon groundsmoke (Gayophytum ramosissimum) -- in July -- Wild Basin, Rocky Mountain National Park, CO white & cream
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prairie evening primrose (Oenothera albicaulis) -- in May -- Pawnee National Grassland, CO white & cream
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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
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short-fruit evening primrose (Oenothera brachycarpa) in April -- Chihuahuan Desert Nature Center, TX yellow & orange
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
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tufted evening primrose (Oenothera caespitosa var. marginata) -- in April -- near Carrizozo, southern New Mexico white & cream
stemless evening primrose (Oenothera caepitosa) -- in May -- Lory State Park, CO
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stemless evening primrose (Oenothera caespitosa) -- in June -- Sand Creek, WY
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stemless evening primrose (Oenothera caespitosa) -- in April -- Arches National Park, UT
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Colorado beeblossom (Oenothera coloradensis) -- in August -- Orchard Cove Trail, Lory State Park, CO white & cream
Colorado beeblossom (Oenothera coloradensis) -- in July -- Sportsman Lake Road, near Tie Siding, WY
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20x magnification
cutleaf evening primrose (Oenothera coronopifolia) -- in July -- Gateway, a Fort Collins NA, Poudre Canyon, Larimer County, CO
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cutleaf evening primrose (Oenothera coronopifolia) -- in August -- Sand Creek National Landmark, WY white & cream
cutleaf evening primrose (Oenothera coronopifolia) -- in May -- South Valley Loop Trail, Lory State Park, CO
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velvetweed (Oenothera curtiflora) -- in August -- Prospect Ponds/ CSU ELC, Fort Collins, CO
birdcage evening primrose (Oenothera deltoides) -- in March -- Milpitas Wash Road, southern California white & cream
birdcage evening primrose (Oenothera deltoides) -- in July -- off of I-70, northern Utah white & cream
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western evening primrose (Oenothera elata var. hirsutissima) -- in July -- McMurry, Fort Collins Natural Area, Larimer County, CO
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Hartweg's sundrops (Oenothera hartwegii) -- in April -- Big Bend National Park, Texas yellow & orange
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Hartweg's sundrops (Oenothera hartwegii) -- in April -- Chihuahuan Desert Nature Center, TX
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Howard's evening-primrose (Oenothera howardii) -- in May -- Neva Road/ 36, Boulder County, CO yellow & orange
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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
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lavenderleaf sundrops (Oenothera lavandulifolia) -- in May -- Pawnee Buttes, Pawnee National Grassland, CO yellow & orange
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lavenderleaf sundrops (Oenothera lavandulifolia) -- in June -- South Republican SWA, Yuma County, CO
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lavenderleaf sundrops (Oenothera lavandulifolia) -- in May -- Canyons of the Ancients National Monument, CO
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Nuttall's evening primrose (Oenothera nuttallii) -- in July -- Young Gulch, Poudre Canyon, Larimer County, CO
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Nuttall's evening primrose (Oenothera nuttallii) -- in August -- Eagle's Nest Open Space, Larimer County, CO
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pale evening primrose (Oenothera pallida ssp. latifolia) -- in May -- San Juan County, Utah white & cream
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pale evening primrose (Oenothera pallida) -- in April -- Arches National Park, UT
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desert evening primrose (Oenothera primiveris) -- in April -- Organ Mountains-Desert Peaks, NM yellow & orange
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dainty sundrops (Oenothera serrulata) -- in June -- South Valley Loop Trail, Lory State Park, CO yellow & orange
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dainty sundrops (Oenothera serrulata) -- in June -- South Republican SWA, Yuma County, CO
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scarlet beeblossom (Oenothera suffrutescens) -- in May -- Neva Road/36, Boulder County, Co
scarlet beeblossom (Oenothera suffrutescens) -- in April -- western Texas white & cream
hairy evening primrose (Oeothera villosa var. strigosa) -- in August -- Rocky Mountain National Park, CO
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hairy evening primrose (Oenothera villosa var. villosa) -- in July -- Lory State Park, CO yellow & orange
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hairy evening primrose (Oenothera villosa var. villosa) -- in September -- Buckhorn Canyon, Larimer County Foothills, CO
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hairy evening primrose (Oenothera villosa) -- in February -- River's Edge Natural Area, Fort Collins, CO
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tansyleaf evening primrose (Taraxia tanacetifolia) -- in July -- Modoc National Forest, CA yellow & orange
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tansyleaf evening primrose (Taraxia tanacetifolia) -- in June -- Steens Mountain Wilderness Area, OR
