Noun
any of various grasses that are short and can tolerate drought conditions; common on the dry upland plains just east of the Rocky Mountains
Source: WordNetOn shortgrass pasture, bison predominately consume warm-season grasses. citation On mixed prairie, cool-season grasses, including some sedges, apparently compose 79–96% of their diet. Source: Internet
The prairie (especially the shortgrass and mixed prairie) is an example of a steppe, though it is not usually called such. Source: Internet