The sweet potatoes originated from Central and South America. Some shreds of evidence suggest that sweet potatoes were growing in the Americas 35 million years ago. But recently, scientists discovered 57 years old leaf fossils in India. As its name suggests, sweet potatoes have a naturally sweet flavor. The sweet potato is a starchy, sweet-tasting root vegetable that belongs to the nightshade family. They are available in 25 varieties. Here are a few of the most popular types of sweet potatoes- Garnet, Jewel, and Beauregard sweet potatoes – This type of sweet potatoes has reddish-orange skin and deep orange flesh. They are rich in various antioxidants. White sweet potatoes They are rumbly, with white flesh and golden brown skin. It does not contain antioxidants as much as orange varieties.