Lactuca petraea DC., Prodr. 7: 134. 1838 Lactuca petraea DC., Prodr. 7: 134. 1838is basionym for Steptorhamphus petraeus (DC.) Grossh., Fl. Kavk. 4: 258. 1934Taxon for this nameLactuca petraea DC., Prodr. 7: 134. 1838