This perennial forms a low clump with soft spreading stems that form a bushy habit. It has divided dark green leaves with ovate leaflets and the bell-shaped  purplish-blue flowers have a yellow centre and appear in clusters during early summer. It is an excellent rockery plant for mountain gardens. 

Hardiness zones 4 to 9 

Polemonium pulcherrimum is naturally found in North America growing in damp woodlands and alpine environments in gritty well-drained moderately fertile soil. It prefers a open sunny position with some mid-day shade and is drought tender but frost tolerant.

The Skunkleaf Polemonium is a hardy perennial that is grown for its low habit and its blue flowers. It is used in rockeries or around water features. It is also suitable for mountain regions and is grown in pots and tubs. it establishes from division in 1 to 2 years and tolerates cold conditions but under dry conditions the leaves collapse. ID 1363

Polemonium (po-lee-MŌ-nee-um) pulcherrimum (pul-KER-ee-mum) 

Polemoniaceae (po-le-moh-nee-AY-see-ee))
Phlox Family