Bromus interruptus, commonly known as the interrupted brome, is a plant in the true grass family. It is endemic to southern and central England, but is believed to have been extinct in the wild since 1972. After several decades in cultivation, the interrupted brome was re-introduced to Aston Rowant National Nature Reserve in 2004, marking the first known re-introduction of an extinct plant in Britain. The plant was a weed of waste places and arable agriculture, particularly of sainfoin (Onobrychis viciifolia) cultivation. It can be distinguished from all other Bromus species by its deeply split, or bifid, palea.