Panicum

T. G. Tutin, V. H. Heywood, N. A. Burges, D. M. Moore, D. H. Valentine, S. M. Walters & D. A. Webb, Flora Europaea 5. 1980
but modified
1Perennial, with non-flowering shoots at anthesis
1'Annual, without non-flowering shoots at anthesis
2Spikelets 4-5.5 mm long; panicle compact, with rigid branches
2'Spikelets 2-3 mm long; panicle diffuse, with capillary branches