Synonyms
Oenothera cespitosa var. eximia (A.Gray) Munz
Oenothera eximia A.Gray
Pachylophus eximius (A.Gray) Wooton & Standl.
Oenothera cespitosa subsp. eximia (A.Gray) Munz
Pachylophus prolatus A.Nelson
Pachylophus cylindrocarpus A.Nelson
Pachylophus marginatus (Nutt. ex Hook. & Arn.) Rydb.
Oenothera idahoensis Mulford
Oenothera marginata Nutt. ex Hook. & Arn.
Oenothera cespitosa var. marginata (Nutt. ex Hook. & Arn.) Durand