Marram grass is an example of a plant adapted to its environment, as it lives on sand dunes where the environment is harsh. The sand its roots are in means water will drain away and its closeness to the sea means it will have to be able to survive wind and being submurged in salty sea water. Marram grass has rolled leaves so its stomata are all facing inwards, this causes water vapour to be trapped so that less water is lost through transpiration. Its roots grow very deep to act as an anchor against the wind, and so that they can reach water very far down.