Cassava is the common name for Manihot dulcis Pax., a semi-woody plant grown for its starchy and fleshy roots.

Onion is a term used for many plants in the genus Allium, particularly the garden onion, Allium cepa.

The potato is a vegetable derived from the root tubers of Solanum tuberosum L.

This plant is a variant of Beta vulgaris, grown in cooler latitudes for the sugar content of the taproot.

The plant has the botanic name Ipomoea batatas Lam. Globally, the sweet-potato is an important root crop. It ranks sixth or seventh in terms of overall production and is an important staple in some regions.

Taro is the common name for Colocasia esculenta Schott., when it is grown as a root crop. It is also known as eddo and dasheen.

Yam is a vegetable obtained from the root of plants of the genus Dioscorea. (Sweet potatoes are sometimes called yam, especially in the US, but are unrelated.)