ragweed plant in allergy season on white background. ambrosia artemisiifolia, annual ragweed

bush sprig leaves branch medicine allergic weeds hairy inflorescence wormwood young botany growing botanical natural closeup allergen bloom rag plant background ambrosia blooming flower leaf ragweed allergy nature green hay artemisiifolia weed annual low white common shot summer fever isolated pollen studio bitterweed autumn season yellow seasonal stem