inflorescence with unopened flowers of canadian horseweed (erigeron canadensis / conyza canadensis) in the meadow

background beautiful beauty bloom blooming bright buds butterweed canadensis canadian close closeup color coltstail conyza dew erigeron field fleabane flora floral flower flowers focus fresh green herb horseweed inflorescence invasive koniza light marestail meadow medicinal morning natural nature outdoor plant selective shine small spring stalk stem summer sunlight sunrays unopened vivid white wild wildflower