sˈɑːntʃəs ɐspˈɜː, ðə pɹˈɪkli sˈoʊθˈɪsəl, ɹˈʌf mˈɪlk θˈɪsəl, spˈaɪni sˈoʊθɪsəl, ʃˈɑːɹpfɹˈɪndʒd sˈoʊ θˈɪsəl, ɔːɹ spˈaɪnilˈiːvd sˈoʊ θˈɪsəl, ɪz ɐ wˈaɪdspɹɛd flˈaʊɚɹɪŋ plˈænt ɪnðə tɹˈaɪb sˈɪkoːɹˌɪiː wɪðˌɪn ðə fˈæmɪli ˈæstɚɹˌeɪsiː.
Sonchus asper, the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow thistle, or spiny-leaved sow thistle, is a widespread flowering plant in the tribe Cichorieae within the family Asteraceae.