Potatoes, poppies, taters,

What do you call Potatoes?

I someone will make the obvious answer or "potatoes" but this is to settle something with a friend who has never experienced any languages other than those in her native land. Which is really a garbled mix of Cant and english.

I refer to them as poppies every now and then, due to them being called that when I was young! What do you call them?

Also state if you have heard of them referred to as Poppies, just to prove she is uncultured!