A large area of flat land with very few trees?

The term for a large area of flat land with very few trees is typically referred to as a "grassland" or "prairie." Grasslands are characterized by their vast expanses of grasses and other non-woody plants, with few trees present due to factors such as low precipitation, poor soil conditions, or frequent wildfires. These ecosystems are important for biodiversity and are home to a wide variety of plant and animal species adapted to this specific environment.