Lactuca alpina (L.) A. Gray, Syn. Fl. N. Amer. 1(2): 444. 1884 Lactuca alpina (L.) A. Gray, Syn. Fl. N. Amer. 1(2): 444. 1884is new combination for Sonchus alpinus L., Sp. Pl.: 794. 1753Taxon for this nameLactuca alpina (L.) A. Gray, Syn. Fl. N. Amer. 1(2): 444. 1884