Synonyms
Delphinium cyanoreios f. wallowense Ewan
Delphinium cyanoreios f. idahoense Ewan
Delphinium cyanoreios Piper
Delphinium diversifolium var. harneyense (Ewan) R.J.Davis
Delphinium diversifolium subsp. harneyense Ewan
Delphinium scopulorum var. diversifolium (Greene) K.C.Davis