Polemonium vanbruntiae

Polemonium vanbruntiae is a species of flowering plant in the phlox family known by the common names Appalachian Jacob's ladder and Vanbrunt's polemonium. It is native to eastern Canada and the northeastern United States.

This perennial herb grows erect from a horizontal rhizome, reaching one meter in maximum height. The leaves are each made up of 7 to 10 pairs of lance-shaped or nearly oval leaflets. The inflorescence is a corymb of purple-blue flowers with yellow centers. The stamens and style protrude from the bell-shaped corolla. This species is similar to Polemonium caeruleum and P. reptans. The plant reproduces sexually and vegetatively, by resprouting from the rhizome, forming large clumps of clones. Flowering occurs in June and July.