Elymus hispidus is a type of wild grass that is commonly found in many regions. The plant is known for its tough and rigid structure, which allows it to thrive in different environments. Elymus Hispidus is also commonly referred to as bottlebrush squirreltail, western wheatgrass, and giant wildrye. These synonyms are often used interchangeably to describe the same plant. Bottlebrush squirreltail is a term used to describe the plant's narrow-bristled flowerheads that resemble a bottlebrush. On the other hand, western wheatgrass is used to describe a larger group of grasses that are similar in appearance and growth habits. Additionally, the term giant wildrye is used to describe a specific variety of Elymus hispidus that is known for its impressive height and large seed heads.