whole lot of lavender-colored flowers of ageratum houstonianum in mid september

ageratum annual bed bloom blossom bluemink blueweed botany bud colored corymbs flora florescence florets flossflower flower flowers fluffy foliage foot garden green greenery growth head herb herbaceous houstonianum inflorescence lavender lavendercolored leaf lilac lot lush mauve mexican mid nature ornamental outdoors paintbrush park petal plant pussy september summer vegetation violet whiteweed whole