California Polemonium, Showy Jacob's Ladder, Moving Polemonium, Low Jacob's-ladder: Polemonium californicum (Synonyms: Polemonium columbianum, Polemonium pulcherrimum ssp. tricolor, Polemonium pucherrimum var. calycinum) -
Elegant Jacob's-ladder, Elegant Polemonium, Sky-pilot: Polemonium elegans -
Littlebells Polemonium, Annual Polemonium, Annual Jacob's-ladder: Polemonium micranthum (Synonym: Polemoniella micrantha) -
Western Polemonium: Polemonium occidentale (Synonyms: Polemonium caeruleum ssp. amygdalium, Polemonium caeruleum ssp. occidentale, Polemonium caeruleum var. pterospermum, Polemonium helleri, Polemonium intermedium, Polemonium occidentale ssp. amygdalium, Polemonium occidentale ssp. occidentale, Polemonium occidentale ssp. typicum) -
Low Jacob's Ladder: Polemonium pulcherrimum var. pulcherrimum (Synonyms: Polemonium berryi, Polemonium fasciculatum, Polemonium haydenii, Polemonium humile, Polemonium lindleyi, Polemonium pilosum, Polemonium pulcherrimum ssp. pulcherrimum, Polemonium pulcherrimum var. lindleyi, Polemonium pulcherrimum var. pilosum, Polemonium shastense) -
