Glacier is the meeting place for a variety of plant communities. Four distinct floristic provinces have been identified in Glacier. Many of the plants typical of the northern Rocky Mountains, Pacific, and northern (Boreal) regions reach their northern, eastern, and southern limits here. The rising of the Rocky Mountains along the East Front creates the western limits of the Great Plains. The forth floristic province is found above the 7000-foot (2100-m) elevation where a fifth distinct plant group, comprised of alpine plants, grows in the rockiest, highest part of the park – forming 'disjunct' or isolated arctic communities.
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