TUNDRAS: Very low vegetation dominated by mosses and many lichens. Found at extreme latitudes or elevations, where temperatures, snow cover, or exposure to wind prohibit the growth of trees.
Rocky Tundra: Usually free-draining tundra in polar regions. Often the soil cover is not complete
Example: Nearctic Rocky Tundra, Nome
Boggy Tundra: Drainage is impeded. Usually contains many very shallow ephemeral lakes caused by melting snow in summer.
Example: Nearctic Boggy Tundra, Barrow
Alpine Tundra: Usually free-draining tundra in high elevation region, above the treeline. Often the soil cover is not complete
Example: Paramo, Ecuador
Latitudes and Precipitation Where this Biome Exists