Carduoideae is the thistle subfamily of the Asteraceae, or sunflower family, of flowering plants. It comprises a number of tribes in various circumscriptions of the family, in addition to the Cynareae. Takhtajan, according to Reveal, includes ten tribes in addition to the Cynareae: the Arctotideae, the Barnadesieae, the Carlineae, the Cichorieae, the Echinopseae, the Eremothamneae, the Gundelieae, the Liabeae, the Mutisieae, and the Vernonieae.