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Habitat - a place where a plant or animal can get the food, water, shelter and space it needs to live.

Hardwood - a general term applied to broadleaf trees. The actual wood may be hard or soft in density.

Hay Man on the Hill - (historical term) the person who spread hay on icy slopes to make it safe for the sleights to travel.

Heartwood - the central core of a tree made of dense, dead wood. The heartwood provides structural support for the tree.

Herbaceous - plants with little or no woody tissue, usually living a single season.

Herbivore - an organism which gets its food energy from plant tissue.

Horizontal Structure - the distribution of forest layers across the landscape.

Humus - organic matter in the soil; a source of nutrients for soil organisms and plants.