Synonyms
Sphaerostigma andinum var. hilgardii (Greene) A.Nelson
Camissonia hilgardii (Greene) P.H.Raven
Oenothera hilgardii Greene
Sphaerostigma hilgardii (Greene) Small
Holmgrenia hilgardii (Greene) W.L.Wagner & Hoch
Oenothera andina var. hilgardii (Greene) Munz