Panicum obseptum Trin.
Plants erect or slightly decumbent, up to 40 cm high. Leaf blades 5–8 cm long, c. 3 mm wide. Panicle with 2–3 spreading branches each with a few spikelets arranged close together. Spikelets 2–3 mm long. In or near water. Fl. summer. White Water Panic