Scentless Chamomile (Matricaria perforata)
Scentless chamomile is a bushy annual plant. It grows from ½ to 2 feet tall and has showy, white flowers that appear from May to October. It is very similar in appearance to the strong scented species, but can be distinguished by its lack of odor. Scentless chamomile was imported from Europe as an ornamental, but has escaped and now invades natural areas worldwide. Aspen, Breckenridge, and Vail have become victims to this silent invader. Populations have been discovered along the South Platte River in Adams County.