But she later stumbled while attempting to spell "melocoton, " a word meaning a peach grafted on a quince root stalk.

WSJ: After 1st vocab test, Spelling Bee gets a champion

Also known as celery root, knob celery and turnip-rooted celery, celeriac developed from the same wild species as did stalk celery.

NPR: The Vegetable World's Ugly Duckling: Celeriac