Latin name: Lactuca serriola
  Family: Asteraceae
  Common name: prickly lettuce
  Life cycle: annual, spreads by seed
Habit: grows tall and upright, 3 to 6 feet tall
Rosette: Rosettes can grow up to 12 inches in diameter.
Foliage: Cauline foliage is pinnately lobed, thick and leathery, and with prickles on the margins and midrib (underside).
Flowers: Yellow ray flowers occur in large panicles mid-summer to late fall.
  Notes: The generic name Lactuca is from the Latin work lac, which means milk. This and some other plants in the genus exude a milky sap when severed.

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