perennial sow-thistle - sonchus arvensis

north america canada canadian ontario toronto high park vertical outdoors nature environment environmental conservation living organism natural outside wild wildflowers bloom blooming blossom botany flora floral flowers horticulture petal plants pretty angiosperms asparagales asteraceae aster and sunflower family perennial sow thistle corn sowthistle dindle field milk gutweed sonchus arvensis yellow urban invasive species