Creeping Crofton Weed Ageratina riparia
The Mistflower is a low-growing, sprawling perennial herb that grows up to 1m high. It has purplish stems which produce roots at joints that touch the ground, and serrated leaves that reach 7.5cm long and 2.5cm wide that taper at each end. The flowers, which bud and flower between August and September, are white with dense heads at the ends of the branches. The seeds are black, slender, angular, 2 mm long, with fine white hairs at the tip. They are dispersed by wind and flowing water. This plant belongs to the Asteracea family and originates from Central America.