Lactuca serriola (Prickly Lettuce) is a species of annualherb in the family Asteraceae. They are native to Western North America. They have dry fruit. Individuals can grow to 0.4 m.
Definition: Of plant duration, a plant whose life span ends within one year after germination, e.g. a winter annual germinating in the autumn and flowering in the spring (esp. in Mediterranean climates), approximately synonymous to therophyte, c.f. biennial, ephemeral, perennial, c.f. also of flowering with respect to architecture, hapaxanthic, monocarpic, pleonanthic.