prickly lettuce n European annual wild lettuce having prickly stems; a troublesome weed in parts of United States Synonym(s) horse thistle Lactuca serriola Lactuca scariola
News & Articles prickly lettuce Grad student to wrestle weeds in collegiate contest Poison hemlock, buffalobur and prickly lettuce, prepare to meet your match! July 19, 2013 - Cornell News Service