epilobium genus --- evening-primrose family
pimpernel willowherb (Epilobium anagallidifolium) -- in July -- Old Fall River Road, Rocky Mountain NP, CO white & cream
pimpernel willowherb (Epilobium anagallidifolium) -- in July -- Boreas Pass Road, Park County, CO red & pink
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
tall annual willowherb (Epilobium brachycarpum) -- in July -- Floriston, northern California red & pink
tall annual willowherb (Epilobium brachycarpum) -- in July -- Grand Teton National Park, WY
tall annual willowherb (Epiolobium brachycarpum) -- in July -- Lava Beds National Monument, CA
American willowherb (Epilobium ciliatum) -- in July -- Long Draw Road, Larimer County Montane, CO
American willowherb (Epilobium ciliatum) -- in August -- Deadman Road, Red Feather Lakes Area, CO white & cream
American willowherb (Epilobium ciliatum) -- in August -- Mount Zirkel Wilderness, Jackson County, CO
talus willowherb (Epilobium clavatum) -- in July -- Elko County, NV red & pink
glaucous willowherb (Epilobium glaberrimum) -- in July -- near Crescent City, northern California red & pink
glandular willowherb (Epilobium halleanum) -- in July -- Sand Creek National Landmark, WY white & cream
glandular willowherb (Epilobium halleanum) -- in July -- Buffalo Pass Road, Jackson County, CO
hairy willowherb (Epilobium hirsutum) -- in August -- St. Vrain State Park, CO red & pink
hairy willowherb (Epilobium hirsutum) -- in September -- Big Thompson Ponds State Wildlife Area, CO
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
milkflower willowherb (Epilobium lactiflorum) -- in July -- Zimmerman Lake Trail, Larimer County, CO