herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

genus Polemonium - type genus of the Polemoniaceae

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

Greek valerian, Polemonium reptans - erect or spreading perennial of the eastern United States

northern Jacob's ladder, Polemonium boreale - perennial erect herb with white flowers; circumboreal

Polemonium viscosum, skunk-weed, skunkweed - tall sticky-leaved herb of the Rocky Mountains having an offensive smell