Variegated thistle

Family: Asteraceae
Scientific name: Silybum marianum
Description: Plant Form: Erect annual or biennial rosette herb. Size: 90 cm to 3 m tall. Stem: Stout, hollow or filled with pith, ribbed, sometimes cottony. Leaves: Shiny green with white veins and with whitish blotches (variegated) above, underneath hairy and paler, spiny on margins and over veins. Larger in rosette and more deeply lobed on stem. Flowers: Large 3-5 cm, spiny, and at the end of long stalks, numerous pink-purple tubular florets forming a head. Fruit and Seeds: Seeds are 5-8 mm long, flattened and shiny blackish with longer barbed bristles. Habitat: Pastures, roadsides, disturbed areas, woodlands. Distinguishing Features: Unlikely to be confused due to variegated leaves and general shape. Weed Status: Priority Weed Weed Type: Agricultural Lifeform: Herbaceous

Example images for this weed