Synonyms
Oenothera alata Nutt.
Oenothera missouriensis f. elongata F.C.Gates
Oenothera missouriensis f. intermedia H.Lév.
Oenothera missouriensis Sims
Megapterium missouriense (Sims) Spach
Megapterium nuttallianum Spach
Oenothera missouriensis var. latifolia A.Gray
Oenothera macrocarpa var. missouriensis (Sims) Carrière
Oenothera missouriensis var. typica Munz