Grass that grows as distinct plants that get larger over time. Also called clump-forming grass. Contrast with spreading grass (also called sod-forming grass), which expands using running roots that create new plants from existing ones.
A type of grass that grows in clusters, it is characteristic of shortgrass prairies, which are drier than tallgrass prairies. Schizachyrium scoparium (Little Blue Stem) is the quintessential bunchgrass.