Vulpia myuros
 Vulpia myuros the rat's-tail fescue is an annual grass species of the genus Vulpia. It was probably originally native to Eurasia but it can now be found nearly worldwide as a naturalized species.In the United Kingdom it forms dense even swards of fine hair-like stems in recently disturbed habitats such as 3-10-year-old pulverised fuel ash. It is typically displaced by perennial grasses after about a decade.