Ageratum houstonianum, early September, west KY, USA
Short variety - Rot am see, Germany 6/2002
AUGERATUM-GREAT BORDER PLANT AND SPREADS RAPIDLY
A.houstonianum 'Blue Danube"
Dubai UAE zone 11
A photo I took at the Dallas Arboretum.
A common pasture weed in these parts
Distinct in color, Joe Pye Weed is easy to spot from the roadside
Close up of the bloom
Floss Flower in Queensland, Australia, January 1992
Ageratum, growing in the wild among rocks next to a river.
Blooming in full sun in East Texas, July 2008