Common name: Carrot Grass, Congress grass, Wild carrot weed
Strange to think that this pretty flowered plant , belonging to the sunflower family, is a highly invasive weed. The white flower, though small, has five distinct corners and grows on stem tips. The plant also releases chemicals that inhibit and prevent the growth of other plants.
Botanical name: Parthenium hysterophorus Family: Asteraceae (Sunflower family)