Celeriac, or celery root, is the root of the celery plant that is harvested after the stalks are cut.
False. Celery and celeriac are from the same family, but the more common variety is harvested for its crunchy stalks above ground, while celeriac is harvested for the knobby stem that grows underground. Though celeriac is often called “celery root,” it’s not a root at all. It’s a bulbous stem. More from Edible Michiana.