Panicum

Tutin, T.G., Heywood, V.H., Burges, N.A., Moore, D.M., Valentine, D.H., Walters, S.M. & Webb, D.A. 1980: Flora Europaea 5
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