Weed 101: Yellow Starthistle (Centaurea solstitialis)

Yellow Starthistle
(Centaurea solstitialis)

Annual taprooted heavily branched weed growing from 0.6 to 1 metre tall; stems are winged and covered with fine hair; yellow flowers are borne on ends of branches and armed with sharp thorns up to 2 cm long
Src: http://www.agf.gov.bc.ca/cropprot/weedguid/yellstar.htm

Control:
Weed eating goats
Src:http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7402.html