SeveralSporobolusspecies are useful range plants in the Western United States. Two of them, however,S. poiretii(Roem. and Schult.) Hitch. andS. indicus(L.) R. Br. have become important weeds in improved sub-tropical and tropical pastures, the former in the South-eastern United States, the latter in tropical America. This paper briefly reviews the distribution, plant characteristics and forage quality of these weeds. Non-chemical and chemical methods of control are also discussed.