Lupin is a genus of flowering plants that belongs to the family Fabaceae. They are commonly known as "lupins" or "lupines" and are prized for their showy spikes of brightly colored flowers. Lupin plants are native to North and South America, Europe, and Africa, and are now grown in many other parts of the world as ornamental plants and as a source of food for both humans and livestock.

Lupin plants have palmate leaves and tall spikes of flowers that can reach up to three feet in height. The flowers are typically blue, purple, pink, yellow, or white, and are arranged in a spike. The foliage of Lupin plants is often green and can be quite ornamental.