A grass of waste ground and waysides, with nodding heads.
Flower details of Bromus sterilis
An annual or biennial grass coming into flower now. Cope and Gray (2009) say that the best way to distinguish this species from B diandrus is the length of the glumes.
B sterilis = lower glume 9-13mm, upper glume 12.5-19.5mm.
B diandrus= lower glume 14-24mm, upper glume 20-32mm.