Gadzooks, I'm spelling like a Kennedy under the influence, please insert peddle for petal.
Gad.
Third time, pedal....sigh.
:)
It's worse than you think! It's PEDAL (a foot operated device used to mechanically alter the condition or response of a machine) as opposed to PEDDLE (to sell, or cause to be sold < see advertising >).
Then again, PETAL is the outermost part of a flower, so you may not be all wrong, if the flower is a STINKHORN.