Polemonium occidentale Greene
Polemonium caeruleum L. ssp. amygdalium (Wherry) Munz
Polemonium caeruleum L. ssp. occidentale (Greene) J.F. Davidson
Polemonium caeruleum L. var. pterospermum Benth.
Polemonium helleri Brand
Polemonium intermedium (Brand) Rydb.
Polemonium occidentale Greene ssp. amygdalium Wherry
Polemonium occidentale Greene ssp. occidentale [JPM2]
Polemonium occidentale Greene ssp. typicum Wherry