A street in Little Norton, and – at number eighteen – home of Doris Purkiss, the witch who told The Quibbler that Sirius Black was actually Stubby Boardman (OP10).
And were it to arm itself with exactly the same cocktail of cyanide as that first plant then clearly it wouldn't be able to protect itself from these Heliconius doris caterpillars, so it doesn't do that.