Tripleurospermum inodorum, common names scentless false mayweed, scentless mayweed, scentless chamomile, wild chamomile, mayweed, false chamomile, and Baldr's brow, is the type species of Tripleurospermum. This plant is native to Eurasia and North Africa and is considered an invasive weed in North America.
Small white ‘daisy’ flower. Petals point down. Leaves divided into fine, dill-like segments. Grow to 1m (3.3 ft).
Native lookalike: white fleabane aster
When are they blooming in Banff National Park? Early July at the earliest. Full bloom usually during the first half of August. Bloom/seeding continuing on until mid September.