Polytrichum

Forest

Continuous stand of trees and includes both forested areas (generally with a closed canopy) and wooded areas.

Shrubland

Includes ecosystems dominated by shrubs and low woody vegetation, often interspersed with grasses or sparse trees.

Grassland

Comprised of grasses and broadleaved herbaceous plants, and are either without woody plants.

Other

A habitat type not covered by any of the other categories in the system.