Pappophorum bicolor E. Fourn. Pappophorum bicolor E. Fourn., Mexic. Pl. 2: 133. 1886 sec. Dávila & al. 2018=Pappophorum bicolor E. Fourn. ex Hemsl., Biol. Cent.-Amer., Bot. 3: 568. 1885 syn. sec. Dávila & al. 2006