Orobanche genus --- Broomrape family
desert broomrape (Orobanche cooperi) -- in March -- Corn Springs Road, southern California blue & purple
clustered broomrape (Orobanche fasciculata)-- in May -- Reservoir Ridge Natural Area, Fort Collins, CO green & brown
clustered broomrape (Orobanche fasciculata) -- in June -- Mill Creek Link Trail, Lory State Park, CO
oneflowered broomrape (Orobanche uniflora) -- in May -- Plainview Road Open Space, Jefferson County, CO blue & purple