Oenothera pallida subsp. runcinata (Engelm.) Munz & W. Klein  
Family: Onagraceae
pale evening-primrose
[Oenothera pallida var. runcinata (Engelm.) Cronq.,  more]
Oenothera pallida subsp. runcinata image
The National Science Foundation
This project made possible by National Science Foundation Award 1410069