Polemonium occidentale ssp. occidentaleSubspecies
Common Name(s)
- western Jacob's-ladder
- western polemonium
Synonyms
- Polemonium intermedium
- Polemonium helleri
- Polemonium caeruleum ssp. amygdalium
- Polemonium caeruleum ssp. occidentale
- Polemonium occidentale ssp. amygdalium
- Polemonium occidentale ssp. typicum
- Polemonium caeruleum var. pterospermum