Lily Family (Liliaceae)
Bruneau mariposa lily (Calochortus bruneaunis) -- in July -- Humboldt County, NV white & cream
winding mariposa lily (Calochortus flexuosus) -- in May -- Canyons of the Ancients National Monument, CO red & pink
mariposa lily (Calochortus gunnisonii) -- in June -- South Valley Loop Trail, Lory State Park, CO white & cream
Sierra mariposa lily (Calochortus minimus) -- in July -- Lassen Volcanic National Park, CA white & cream
sego lily (Calochortus nuttallii) -- in June -- Yampa Bench Road, Dinosaur National Monument, CO white & cream
small camas (Camassia quamash) -- in June -- Lolo Motorway, Nez Perce-Clearwater National Forest, ID blue & purple
queen's cup (Clintonia uniflora) -- in June -- Fishcreek Campground, Glacier National Park, MT white & cream
yellow trout lily (Erythronium americium) -- in April -- Pisgah National Forest, western North Carolina yellow & orange
yellow avalanche lily (Erythronium grandiflorum) -- in June -- The M Trail, Gallatin National Forest, southern Montana yellow & orange
yellow avalanche lily (Erythronium grandiflorum) -- in April -- Columbia Gorge, northern Oregon
yellow avalanche lily (Erythronium grandiflorum) -- in May -- Roosevelt National Forest, Larimer County Montane
yellow avalanche-lily (Erythronium grandiflorum ssp. grandiflorum) -- in May -- Rabbit Ears Pass, Montane, CO yellow & orange
yellow avalanche lily (Erythronium grandiflorum ssp. grandiflorum -- in August -- Snowy Range, Medicine Bow NF, Wyoming
fawn lily (Erythronium purpurascens) -- in July -- Lassen Volcanic National Park, CA white & cream
yellow bell (Fritillaria pudica) -- in June -- Beartooth Highway, Gallatin National Forest, southern Montana yellow & orange
yellow bell (Fritillaria pudica) -- in April -- Columbia Gorge, northern Oregon
leopard lily (Lilium paradalinum) -- in July -- Lassen Volcanic National Park, CA yellow & orange
alpine lily (Lilium parvum) -- in July -- Yosemite National Park, CA yellow & orange
wood lily (Lilium philadelphicum) -- in July -- Cub Lake Trail, Rocky Mountain National Park, CO yellow & orange
Washington lily (Lilium washingtonianum) -- in July -- Yosemite National Park, CA white & cream
alp lily (Lloydia serotina) -- in July -- Trail Ridge Road, Rocky Mountain National Park, CO white & cream
roughfruit fairybells (Prosartes trachycarpa) -- in April -- Columbia Gorge, northern Oregon white & cream
twisted stalk (Streptopus amplexifolius) -- in June -- Buckhorn Canyon, Roosevelt National Forest, CO white & cream
twisted stalk (Streptopus amplexifolius) -- in August -- Rocky Mountain National Park, CO