Yorkshire Fog is a type of perennial grass typically found in meadows and fields in the UK. Its scientific name is Holcus lanatus, and it's also commonly known as Velvet Grass. Other synonyms for Yorkshire Fog include Yorkshire Spear Grass, Common Soft Grass, and Bulbous Meadow Grass. This grass is known for its fuzzy appearance and is often used as forage for livestock. In addition to its practical uses, Yorkshire Fog has also been used in traditional medicine to treat conditions such as bladder and kidney problems. It's a versatile and hardy grass that has many different names depending on where you are in the world.