A Large area with lots of trees and bushes
Florida
A large area of grass, usually around a house or building.
the great plains, the sarengetti, and the pampas are all grasslands.
the EVERGLADES
In the sense that it looks like grass, is plant, has roots, has long elongated leafs with little to no stems growing out of the ground and can cover large area while being so close to each other to the point that they overlap, yes. It is a type of grass and if for some reason it isn't it should be. Besides, why call it sea grass if it isn't grass?
It is a prarie
there are many types, but a very common one is called "zebra grass". This grass however also has horizontal stripes on it's reeds.
Grass is a plant. A "large patch of grass" is a group of plants.
in the beach level, when you are riding along and happen to see a large area of grass and in the grass you see shards of grass flying up in the air, through apples and other objects randomly into the grass and if you are lucky you will hit scyther and he/she will jump out.
A desert, a beach, a sandpit.
The ancient Romans called any large open area a campus. An example is the Campus Martius at Rome.