Lactuca acanthifolia (Willd.) Boiss.
Notes
A pragmatic solution to treat the genus Lactuca in a wide sense is followed here (based on Greuter 2003: 230), because the current morphological generic concepts of Cephalorrhynchus, Cicerbita, Mycelis and Steptorhamphus still lack support by molecular phylogenetic analyses and therefore are not yet fully clear.