Celeriac

Celeriac (Apium graveolens rapaceum) is also known as celery root, turnip-rooted celery or knob celery. It is a kind of celery, grown as a root vegetable for its large and bulbous hypocotyl rather than for its stem and leaves. The swollen hypocotyl is typically used when it is about 10–12 cm in diameter; about the size of a large potato. Unlike other root vegetables, which store a large amount of starch, celeriac is only about 5-6% starch by weight.