Family: Asteraceae (Daisy Family).
Other names: Yellow Star Thistle (C. solsitialis).
Natives of Europe and western Asia.
Occurrence: Rare. Record St Barnaby's Thistle at Hamiltons Crossing 1987.
St Barnaby's Thistle is a proclaimed noxious weed (Restricted in Central Victoria).
St Barnaby's Thistle (*Centaurea solsitialis). The spines have one or two small spines rising from the base.
Malta Thistle (or Cock's-spur Thistle), (*Centaura melitensis) The slender spines have up to 3 pairs of small spines at the base.