Rheum rhabarbarum is a scientific name for rhubarb - a plant that's widely used in cooking and baking. Although it may seem like a mouthful, there are various synonyms for the term. These include names like Ribes spicatum, Rumex acetosa, and Rheum undulatum. All of these refer to a plant that's known for its tart and bright flavor. Rhubarb is used in many different dishes, from pies to jams and jellies, and is often paired with sweet fruits to balance out its tang. Whether you call it rheum rhabarbarum or ribes spicatum, this plant is a delicious addition to any kitchen.