Family, Composite. Color, yellow. Flowers, all tubular and much compressed into flat-topped corymbs.

Leaves, much cut into fine-toothed segments or leaflets, on winged petioles which are also cut-toothed.

An herb formerly cultivated for its medicinal qualities. It has escaped from gardens and become a weed in some places. Plant from 3 to 4 feet high, usually lower, with a strong, pungent scent.