Paspalum millegrana (yerba brava).
Paspalum millegrana is a perennial grass that forms tough clumps up to 2 m high. Within its native distribution range it is considered a weed of swampy grounds, periodically flooded sites, stream banks, lakesides, areas near mangroves and beaches, irrigation channels, and moist disturbed sites. This species spreads easily by seeds and vegetatively by stem fragments. To date, P. millegrana is only listed as invasive in Cuba.