Cystoseira pustulataCystoseira pustulata is a species of brown alga in the genus Cystoseira.DistributionCystoseira pustulata occurs in the Mediterranean and Northeast Atlantic. Records of Cystoseira humilis in the Mediterranean refer to this species.TaxonomyCystoseira pustulata has variously been treated as a variety or subspecies of Cystoseira compressa, or considered a synonym of C. humilis, but constitutes a distinct genetic entity not closely related to either.