A. Arboriculture refers to that part of horticulture which deals with the study and care of trees and other woody plants.

B. City means the City of Portland.

C. Commission means the Urban Forestry Commission.

D. Engineer means the City Engineer.

E. Forester means the City Forester.

F. Person includes any individual, firm, association, corporation, agency, or organization of any kind.

G. Plan means the Tree Planting and Maintenance Plan for streets, parks and public areas, also known as the Urban Forestry Plan.

H. Pruning refers to cutting or removing any part of the branching structure of a plant in either the crown, trunk or root areas.

I. Public area means City-owned lands not located in the park or street right-of-way.

J. Removal refers to the cutting or removing of 50 percent or more of the crown, trunk or root system of a plant, resulting in the loss of aesthetic or physiological viability.

K. Street shall have the meaning set forth in Section 9-101 of the City Charter.

L. Superintendent means the Superintendent of Parks and Recreation.

M. Tree shall include only those trees which are located on public property or those which are assigned to the jurisdiction of the Forester by other City policies, procedures and Code provisions.

N. Urban Forestry has as its objective the cultivation and management of trees and related plants for their present and potential contribution to the physiological, sociological and economic well being of urban society. Inherent in this function is a comprehensive program designed to educate the urban populace on the role of trees and related plants in the urban environment. In its broadest sense, urban forestry is one essential component of a multi-managerial system that includes watersheds within the City, wildlife habitats, outdoor recreation opportunities, landscape design, recycling of municipal vegetative wastes and tree care in general.