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Polemonium caeruleum

Family: polemoniaceae
Common name(s): Jacob's ladder
Hardiness ratings: USDA zone 3~4 - 7~9

General resources

  • Wikipedia. Online encyclopedia entry (if defined).
  • Google images. Web search for photographs.
  • GRIN. Taxonomical details, with common names, distribution, and synonyms.
  • The Plant List. Taxonomical lookup

Links for Polemonium caeruleum

Polemonium caeruleum var. album


Polemonium caeruleum himalayanum


Polemonium caeruleum sspdissectum


Polemonium caeruleum subsp. villosum

Common name(s): Jacob's ladder


Polemonium caeruleum subsp. yezoense

Common name(s): Purple-leaf Jacob's Ladder
Synonym(s): Polemonium yezoense
Hardiness ratings: USDA zone 3~5 - 7~9


Last updated:02 Jul 2017