(a) Types of Trees Prohibited. The following types of trees shall not be planted as street trees or upon public lands in the City: Acer saccharinum (Silver Maple); Acer negundo (Box elder); Ailanthus altissima (Tree of Heaven); Catalpa speciosa (Catalpa); Gleditsia Triacanthos (Common Honey locus, except that thornless varieties are acceptable); Gymnocladus dioica (Kentucky Coffee Tree); Maclura promifera (Osageorange); Morus (various species) (Mulberry); Populus (various species) (White Poplar, Cottonwood and others); Rhus (various species) (Sumac); Robinia pseudoacacia (Black Locust); Salix (various species) (Willow); Ulmus pumila (Siberian or Chinese Elm); Tilia americana (Basswood); Acer platanoides (Norway Maple); Ailanthus altissima (Chinese Tree of Heaven); Alnus glutinosa (European Black Alder); Alnus icana (European White Alder); Broussonetia papyrifera (Paper mulberry); Decondon verticillatus (Swamp Loosestrife); Lythraceae (Loosestrife); Malus floribunda (Japanese Crab Apple); Malus sieboldii (Toringo Crab Apple); Morus alba (White Mulberry); Morus rubra (Red Mulberry); Picea abies (Norway Spruce); Rhamnus cathartica (European Buckthorn); Rhamnus frangula (Alder Buckthorn). (Ord. 96-90. Passed 1-6-97.)
(b) Trees with Thorns Prohibited. Trees of any type with thorns shall not be planted as street trees or in any public area which would present a danger to pedestrian or wheeled traffic.
(c) Trees on Private Property. Any tree on the list specified in subsection (a) hereof, or a tree with thorns, upon private property in the City in such close proximity to any public place in the City as shall permit the roots of such tree to penetrate through or under the surface of any public place, or the branches to overhang any public place, or the leaves, branches or fruits to unduly present, through their inherent characteristics, undue maintenance on the part of the City or danger to pedestrian or wheeled traffic, is hereby declared to be a public nuisance and may be abated by the City Arborist as provided in Sections 905.02
(c) and 905.08
.