kingdom: Plantae >
subkingdom: Pteridobiotina Britton & Brown >
phylum: Tracheophyta >
class: Magnoliopsida >
order: Myrtales Juss. ex Bercht. & J. Presl >
family: Onagraceae Juss. >
subfamily: Onagroideae Beilschm. >
genus: Oenothera L. >
USA (Colorado, New Mexico)