VOCABULARY - U
Understory - forest vegetation present under the overstory which can include trees, shrubs, and forbs.
Uneven-age Management - a forest management technique used to maintain a stand with trees of all ages from seedling to mature. Also known as all-aged.
Urban Forest - the trees and associated living organisms in an urban area.
Urban Forester - a person who plants and takes care of trees in cities, towns, and neighborhoods.