The name given to an area that is a flat treeless plain is a steppe.
what is a vast flat treeless region in which the subsoil is permanently frozen is called
Plain
tundra
Tundra is a flat, treeless plain where the subsoil is frozen
An extensive area of flat , predominantly treeless grassland.
tundra
tundra
an area of land of mostly flat treeless land
tundra
A tundra. Its has permafrost and plants don't decompose because of it. It is a really harsh region. <><><> It may also be a prairie. The grasslands of Wyoming have almost NO trees.
plateau