Celery
Celery is a versatile vegetable that can be added to just about everything. It also has medicinal value, in that it can be used to treat joint pain (rheumatism), gout, hysteria, nervousness, headache, weight loss due to malnutrition, loss of appetite and exhaustion.
Celery is rich in vitamins and minerals with a low glycemic index. You'll enjoy vitamins A, K, and C, plus minerals like potassium and folate when you eat celery. It's also low in sodium. Plus, it's low on the glycemic index, meaning it has a slow, steady effect on your blood sugar.
Celery and celeriac are basically the same plant, Apium graveolens, with celeriac being a variety cultivated for its root rather than for its stalks (var. rapaceum). They both have the taste of celery, although many people find celeriac to be earthier and more intense.