The Jacob's ladder (Polemonium boreale) belongs to Polemoniaceae (the Phlox family). It is a perennial herb that is distributed around the frigid regions of Central Asia. It grows on rocky, gravelly slopes and is 15-25 cm tall. The leaves are mainly basal leaves, pinnate compound with elliptic to circular leaflets. The stems and leaves are hairy. In summer, cymes are produced at the end of the flower stalks, and blue, purple, or white flowers bloom.