ɔːlðˈoʊ ðə stˈændɚd dˌɛfɪnˈɪʃən ʌv lˌæktuːkˈɛɹiəm ɹᵻkwˈaɪɚz ɪts pɹədˈʌkʃən fɹʌm lˈæktuːkə vɪɹˈoʊsə, ɪt wʌz ɹˈɛkəɡnˌaɪzd ðæt smˈɔːlɚ kwˈɔntᵻɾiz ʌv lˌæktuːkˈɛɹiəm kʊd biː pɹədˈuːst ɪn ɐ sˈɪmɪlɚ wˈeɪ fɹʌm lˈæktuːkə sˈæɾɪvə ænd lˈæktuːkə kˌænɐdˈɛnsɪs vˈɑːɹ.
Although the standard definition of lactucarium requires its production from Lactuca virosa, it was recognized that smaller quantities of lactucarium could be produced in a similar way from Lactuca sativa and Lactuca canadensis var.