Noun | 1.Greek valerian - erect or spreading perennial of the eastern United StatesPolemonium reptanspolemonium - any plant of the genus Polemonium; most are low-growing often foul-smelling plants of temperate to Arctic regions | | 2. Greek valerian - pinnate-leaved European perennial having bright blue or white flowersJacob's ladder, Polemonium caeruleum, Polemonium van-bruntiae, Polymonium caeruleum van-bruntiae, charitypolemonium - any plant of the genus Polemonium; most are low-growing often foul-smelling plants of temperate to Arctic regions |