Pickerelweed has elongated heart–shaped leaves with violet-blue flowers.
Bright green leaves are straight, triangular, and can be egg-shaped to sword-shaped. Pickerelweed leaves are twice as long as they are wide. At the base they are heart-shaped or cut off and up to three-fourths of an inch wide. Straight flower spikes are up to six inches long with violet-blue or white flowers that have a short life cycle. The flowers of pickerelweed are funnel-shaped and have two lips. Fruits are thin and bladder-like with one seed. Thick, creeping rhizomes are rooted in mud with stems up to three feet tall.
Pickerelweed is common throughout the eastern half of the United States.