Mayweed chamomile is a bushy annual that can adapt to various conditions and is native to Europe. The seeds are 10 ribbed with small glandular bumps. Mayweed chamomile is a prolific seed producer, producing more than 960,000 seeds per plant. The seeds viability in soil range from 4 to 6 years. The leaves are finely dissected, alternate, and approximately 0.75 to 2.5 inches long and 1 inch wide. Leaves may have some short hairs and emit an unpleasant odor. Flowers are solitary and borne at the ends of branches. They are 0.75 to 1.25 inches in diameter with 12 white ray flowers and yellow disk centers. The white ray flowers are in bloom from June through September. Mature plants grow from 0.5 to 2 feet tall and are highly branched.