Sneezewort is a hardy perennial plant that grows in damp fields and along roadsides in Europe, Asia, and North America. It is called sneezewort because its strong odor causes some people to sneeze. The plant grows from 1 to 2 feet (30 to 60 centimeters) high. It is an overall grayish color and has long, pointed, dark green leaves. It has loose clusters of small white flowers.