A potato candidate.The best part of him isunderground.

-Anonymous
  Of  Adlai Stevenson and his respectable ancestors. In the Washington Post, 9  Jan.

You say potato and I say po-tah-to You say tomato and I say to-mah-to† Let's call the whole thing off!

-Gershwin, Ira originally Israel Gershowitz
  'Let's Call theWhole Thing Off', song from the film musical Shall We Dance? (music by George Gershwin).

Humannature will not flourish, any morethana potato, if it be planted and replanted, for too long a series of generations, in the same worn-out soil.

-Hawthorne, Nathaniel
  The Scarlet Letter,'The Custom-House'.

Oh, poor Pearl Buck! She has no more bounce than a boiled potato.

-Porter, Katherine Anne
Quoted from the journals of GlenwayWestcott, in Robert Phelps andJerry Rosco (eds) Continuous Lessons (1990).