*Xanthium cavanillesii
Leaves very shallowly and unevenly lobed, ovate, up to 12 cm long. Burrs ellipsoid, 15–30 mm long, with 2 larger terminal straight spines 6–8 mm long. Herb up to 1 m high. Weed of cultivation and waste places, particularly along creek flats. Fl. summer–autumn. South American Burr