Arches National Park, Oenothera caespitosa

Common name: tufted evening primrose. Family: Onagraceae (evening primrose family). Confirmed as present in the following Northern Colorado Plateau Network parks: Arches National Park,
Bryce Canyon National Park,
Canyonlands National Park,
Capitol Reef National Park,
Cedar Breaks National Monument,
Curecanti National Recreation Area,
Dinosaur National Monument,
Fossil Butte National Monument,
Golden Spike National Historic Site,
Hovenweep National Monument,
Pipe Spring National Monument,
Zion National Park