Which grass is specifically known for the adaptation of being suited for high grazing pressures?

The grass known for its adaptation to high grazing pressures is Andropogon gerardii, commonly referred to as big bluestem. This species has evolved to thrive in environments that are subject to frequent grazing, which is a common occurrence in prairies and savannas where it typically grows. Its extensive root system enables it to access water and nutrients efficiently, allowing it to recover quickly after being grazed. Additionally, big bluestem has a growth pattern that promotes resilience under clipping or grazing, making it highly suitable for regions where such pressures are prevalent.

Other grasses mentioned may have certain beneficial traits, but they are not as specifically adapted to withstand and bounce back from high levels of grazing as Andropogon gerardii is, which is why it stands out as the best answer for this question.