Pennisetum is a genus of ornamental grasses that belongs to the family Poaceae. They are commonly known as "fountain grass" and are prized for their graceful, arching form and feathery plumes. Pennisetum plants are native to Africa, Asia, and Australia, and are now grown in many other parts of the world as ornamental plants.

Pennisetum plants have upright or arching stems that can reach up to four feet in height. The foliage is typically green or bronze, and can be quite ornamental, with narrow, arching leaves. In summer and fall, Pennisetum plants produce feathery, bottlebrush-like plumes that can be up to one foot in length.