dense corymbs of mauve flowerheads of ageratum houstonianum

ageratum annual beautiful bed bloom blossom blossoming bluemink blueweed botany bud corymbs dense flora florescence florets flossflower flower flowerheads fluffy foliage foot garden green greenery growth head herb herbaceous houstonianum inflorescence june leaf lilac lush mauve mexican nature ornamental outdoors paintbrush park petal plant summer vegetation violet whiteweed