Family: Poaceae, grass family
Genus species: Panicum vigatum
Leaves are elongated, flat. Margins of leaves are rough. Upper surface of leaf base has a triangular patch of hairs.
Flowers are small, arranged in diffuse spikes. Spikes are up to 20 inches long.
Seed head is open, with branches projecting outward.
Panicum is from the Latin for a type of grass and virgatum is from the Latin for "twiggy" or "with branches," referring to the branching spikes of flowers.