15 cm ruler for scale

Erect perennial with opposite, deeply incised leaves with short stalks. Leaves lanceolate, we measured a typical leaf at 5.5 cm long and 2.5 cm wide. Small white flowers in leaf axils, flowers with reddish-purple spots, flowers tubular, 2 mm diameter. Flowers appear in early July. Stems square in profile, reddish coloured below.

Habitat is stream banks, swamps, and other wet areas. Common.

Height is listed in Budd's Flora from 30 to 80 cm, plant in above photo was 28 cm tall.

The above photos were taken July 1st, wet prairie meadow, 70 km south east of our home in Regina, SK.