The short-stalked leaves are broadly ovate with coarsely serrated margins. Tips of stems are often ascending. Leaves on the lower stems are paired, but on the upper portion of the stem are alternate. The short petioled leaves are longer than they are broad and coarsely toothed. The sky-blue flowers with dark stripes and a white center are irregular on long slender, hairy stalks in the leaf axils.
Fruits are heart-shaped and hairy.
Now widespread in the United States.