Panicum ambiguum may refer to four different species of plants: Panicum ambiguum (Guss.) Hausskn., a synonym for Setaria verticillata (L.) P.Beauv. Panicum ambiguum Trin., a synonym for Urochloa glumaris (Trin.) Veldkamp Panicum ambiguum Le Turq., a synonym for Cynodon dactylon (L.) Pers. Panicum ambiguum Lapeyr., a synonym for Digitaria sanguinalis (L.) Scop.