NOUN (1)

1. any plant of the genus Polemonium; most are low-growing often foul-smelling plants of temperate to Arctic regions;

The Collaborative International Dictionary of English v.0.48:

Polemonium \Pol`e*mo"ni*um\ n. [NL., fr. Gr.? a kind of plant.]
   (Bot.)
   A genus of gamopetalous perennial herbs, including the
   Jacob's ladder and the Greek valerian.
   [1913 Webster]