“…DeLisle, 1963;Türpe, 1983;Clayton and Renvoize, 1986;Crins, 1991;Watson and Dallwitz, 1992). Some species of The degree of fusion of the bristles is commonly used to separate these genera (Pilger, 1940;DeLisle, 1963;Clayton, 1972Clayton, , 1989Renvoize, 1982, 1986;Filgueiras, 1984;Watson and Dallwitz, 1992). In most New World species of Cenchrus the degree of fusion is substantial, although there are several Old World species in which this distinction is less obvious (Crins, 1991).…”