greek valerian

(noun) erect or spreading perennial of the eastern United States. Synonyms: Greek valerian, Polemonium reptans.

(noun) pinnate-leaved European perennial having bright blue or white flowers. Synonyms: Jacob's ladder, Greek valerian, charity, Polemonium caeruleum, Polemonium van-bruntiae, Polymonium caeruleum van-bruntiae.