chick weed or whiteweed (ageratum conyzoides) in bloom : (pix sanjiv shukla)

ageratum conyzoides billygoatweed chick weed goatweed whiteweed mentrasto invading family asteraceae compositae aster daisy composite sunflower flowering plant tropical invasive regions herb ovate leaves green flower white mauve medicinal traditional culture poisoning poison toxic poisonous alkaloids environment natural range cultivation grazing animals meadow grassland africa australia southeast asia hawaii usa america brazil insecticide nematicide