Phleum phleoides

Phleum phleoides (common names: Boehmer's cat's-tail and purple-stem cat's-tail) is a perennial grass native to most of Europe, North Africa, and temperate Asia. Culms are erect and 10–70 centimetres (3.9–27.6 in) in height; leaf blades are 5–12 centimetres (2.0–4.7 in) long by 1–3.5 millimetres (0.039–0.138 in) wide. It can be confused with related species Timothy-grass, Phleum pratense. However purple-stem cat's-tail prefers lighter soils and grows on chalk downland....read more on Wikipedia.