lˈæktuːkə sˌɛɹɪˈoʊlə, ˈɔːlsoʊ kˈɔːld pɹˈɪkli lˈɛɾɪs, mˈɪlk θˈɪsəl nˌɑːt təbi kənfjˈuːzd wɪð sˈɪlɪbəm mˈæɹiənəm, ˈɔːlsoʊ kˈɔːld mˈɪlk θˈɪsəl, kˈʌmpəs plˈænt, ænd skˈæɹoʊl, ɪz ɐn ˈænjuːəl ɔːɹ baɪˈɛnɪəl plˈænt ɪnðə tɹˈaɪb sˈɪkoːɹˌɪiː wɪðˌɪn ðə fˈæmɪli ˈæstɚɹˌeɪsiː.
Lactuca serriola, also called prickly lettuce, milk thistle (not to be confused with Silybum marianum, also called milk thistle), compass plant, and scarole, is an annual or biennial plant in the tribe Cichorieae within the family Asteraceae.