A streamside and marsh dweller, this species is much less common than American Brookline, which is found in similar habitat. The stems are long and hairless, and the leaves are lancelike and lack teeth.

This photo shows a developing seed capsule, late in the season. The flowers are small, white to blue, and borne in loose racemes.

Distinguished from American Brookline by the stalkless, toothless leaves, this is a much less common species. The long stems are hairless.