Who played Mrs Dubose in the 1962 film of To Kill a Mockingbird?

an old woman who lives near the Finches. she is addicted to morphine, but after she learns she is going to die, she tries to quit. she has withdrawls, and yells at Scout and Jem, so Jem destroys her flowers. Atticus makes them read to her, and Atticus says that she is the bravest person he ever knew. she leaves a flower for jem