A low, wet land that supports grass and trees is a swamp. Many swamps occur along large rivers where they are dependent on the water fluctuations. Swamps also occur along the edges of lakes.
A low, wet land with tall grasses is called a marsh. A marsh is where many animals and waterfowl live. The tall grasses allow them to hide from predators.
Tundra
Grasslands low precipitation deciduous forest coniferous trees low grasses icecap climate
This would be a prairie or a grassland, typically found in regions with low rainfall and tall grasses. These areas are characterized by open, vast expanses of grass with few or no trees.
Moderately low rainfall with long periods of droughts. Mostly inhabited by grasses, low and sparce trees and shrubs, and grazing animals plus their predators.
Grasses, forbs, sedges, low-growing shrubs, etc.
A marsh or bog
Insufficient rainfall to support trees
A flat area of land at low elevation covered with grasses is typically referred to as a "plain." Plains can vary in size and are common landscapes found in various parts of the world. They are characterized by their relatively flat topography and abundant grass vegetation.
A mixed grass, too much alfalfa will cause a lot of problems, a timothy grass mixture is good for them. Goats can survive on low quality grasses and love to eat bushes, trees and grass.
Tall grass is a marsh and if there are trees it is a swamp.
A plain is a flat, treeless area of land, often covered in grasses or low vegetation, with minimal changes in elevation or relief. Plains are typically found between mountain ranges or along coastal regions.