G5T4?
Secure, Infraspecific Taxon, Questionable taxonomy
Oenothera caespitosa ssp. navajoensis (Navajo Evening Primrose)
Perennial herbs, simple or branched; herbage typically puberulent to villous, glandular or glabrous, typically basal rosette; fragrant flowers, solitary, opening in evening. The variety is pubescent mainly along leaf margins and on the flowers.