holmesblackwoodmathewson:

Lactuca Serriola (Asteraceae)

Prickly Lettuce

This plant is a very, sedative herb with an unpleasant smell. It contains a mildly narcotic compound lactucarium or lettuce opium. Beatrix Potter describes it in The Tale of the Flopsy Bunnies saying that eating too much lettuce can have a ‘soporific’ effect.

                -The Poison Garden (The Alnwick Garden)

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