Chapter 10 Tree Canopy, Landscaping and Open Spaces Appendix B Prohibited Plant List

PLANT TYPE	SCIENTIFIC NAME	COMMON NAME 'CULTIVAR'	COMMENTS
A	Ailanthus altissima	Tree of Heaven All cultivars	This tree is a highly invasive exotic, is weak wooded and of poor quality.
A	Betula papyrifera	Paper Birch All cultivars	Susceptible to Bronze Birch Borer. Life expectancy in a site with some stress (I.e. street tree) is short in an urban area.
A	Betula pendula	European White Birch All cultivars	This tree is highly susceptible to leaf miner and Bronze Birch Borer. This tree is also intolerant of urban stress and short lived.
A	Diospyros virginiana (female)	Persimmon (females only)	The fleshy fruit makes this a messy tree for pedestrian and parking environments.
A	Ginkgo biloba (female)	Ginkgo (females only)	The female of this species is unacceptable because of its fruit. The fleshy seed is extremely messy and malodorous.
A	Gleditsia triacanthos	Common Honey Locust	This tree is too thorny for use in the urban environment and especially for meeting ordinance requirements.
A	Gymnocladus dioicus (female)	KY Coffee Tree (females only)	This tree produces six inch long leathery pods with sticky pulp which produce a messy condition unacceptable for urban situations.
A	Morus alba	Asian White Mulberry All cultivars	This tree is a highly invasive exotic, made even more unacceptable because of the messy fruit.
A A	Populus (all) Populus deltoides	Poplars 'White Poplars' ‘Lombardy Poplar’ 'Quaking Aspen' All species and cultivars Eastern Cottonwood All cultivars	All the listed poplars are unacceptable because they are disease prone, weak wooded and their roots will clog drain tiles, and storm and sanitary sewer lines.
A A A A	Triadica sebifera Ulmus carpiniflora Ulmus fulva Ulmus pumila	Chinese Tallowtree All cultivars Smoothleaf Elm All cultivars Red Elm All cultivars Siberian Elm All cultivar	Invasive to stream banks, ditches, and wet areas. Abundant seed help this plant spread vigorously. These trees are of poor quality and weak wooded with frequent wind damage. The plants also have disease and insect problems.
B	Acer negundo	Box Elder All cultivar	This tree is of poor quality and weak wooded with frequent wind damage. The plant is disease and insect susceptible.
B	Albizia julibrissin	Mimosa Tree All cultivar	The mimosa is an invasive exotic noxious species. This tree is weak wooded, and the seed pods are messy, with seed pods littering the ground. It is not very disease and insect tolerant.
B	Maclura promifera (female)	Osage Orange (females only)	The large fruit, 3-4" diameter, makes this plant unacceptable to meet code.
B	Malus pumila	Common Apple All cultivar	This tree is weedy and its fruit is too large to warrant the use of this tree to meet ordinance requirements. Some varieties are susceptible to disease.
B	Melia azedarach	Chinaberry Tree All cultivar	This tree vigorously spreads and has abundant poisonous seeds
B	Paulownia tomentosa	Princess Tree All cultivar	This tree has a long leaf drop period, messy seed pods, and huge leaves, which make it unsuitable to meet ordinance requirements.
B	Pyrus calleryana	Callery Pear 'Bradford'	This tree exhibits severe structural problems with main trunks splitting apart and has some serious disease problems.
B	Pyrus communis	Common Pear All cultivar	This tree is extremely susceptible to fireblight and its large fruit makes this tree unsuitable for urban use.
B	Salix babylonica	Weeping Willow All cultivar	Messy (always dropping small branches), weak wooded, susceptible to canker (disease), taps sewer and water lines.
B	Sorbus (species)	Mountain Ash All species and cultivars	These trees are susceptible to a host of diseases and pests. This tree is not recommended as a street tree because it is not urban tolerant and it has 1/2" fleshy seed pods. Best used in open lawn areas for private use.
C	Elaeagnus umbellata	Autumn Olive All cultivar	This plant is a highly invasive exotic, and is short lived.
C	Elaeagnus angustifolia	Russian Olive All cultivar	This plant is a highly invasive exotic, and is short lived.
C	Euonymus alatus	Winged Euonymus All cultivar	This plant is an invasive exotic in natural areas.
C	Euonymus kiautschovicus	Spreading Euonymus All cultivar	Susceptible to severe, annual winter damage or death.
C	Hibiscus syriacus	Rose of Sharon All cultivar	This exotic species seeds itself aggressively; therefore, it is unacceptable to meet long term landscaping needs.
C	Laburnum x watereri	Golden Chain Tree All cultivar	This plant is not reliably hardy in this zone. Seeds are poisonous.
C	Ligustrum (all)	Privets All species and cultivars	These trees are of poor quality and weak wooded with frequent wind damage. The plants also have disease and insect problems.
C	Lonicera japonica	Japanese Honeysuckle All cultivar	This plant is a highly invasive exotic that is often weedy and twining. The plant is a vigorous grower and often takes over natural areas.
C	Lonicera maackii	Honeysuckle All cultivar	This species is a highly invasive exotic.
C	Lonicera morrowii	Honeysuckle All cultivar	This species is a highly invasive exotic.
C	Lonicera tatarica	Tatarian Honeysuckle All cultivar	These species are highly invasive exotics.
C	Malus (selected)	Crabapples (as shown) Almey', 'Corovaria' Dorothea', 'Eley','Hopa' Ioensis', 'Red Silver' Radiant', 'Sylvestris'	Many of the old varieties of crabapples are susceptible to disease and insects. There are many new clones which are highly resistant to the four major crabapple diseases
C C	Prunus cerasifera (Straight Species) Prunus persica	Cherry Plum (Straight Species) Peach All cultivar	Both of these trees have serious disease problems and are pollution sensitive.
C	Rhamnus cathartica	Common Buckthorn All cultivar	This species is a highly invasive exotic.
C	Rhamnus frangula	Glossy Buckthorn All cultivar	This shrub experiences serious disease problems and can be a highly invasive exotic. It also has problems surviving in areas with heavy traffic, because of soil compaction.
D	Ilex cornuta	Chinese Holly All cultivar	The plant is susceptible to severe winter damage or death, and is not hardy in this zone.
D	Philadelphus coronarius	Sweet Mockorange All cultivar	The open habit of this plant does not meet code.
D	Photinia x fraseri	Fraser Photinia or Red Tip All cultivar	This plant is not completely hardy in this region.
D	Photinia villosa	Oriental Photinia All cultivar	The plant has problems with disease, which limits its use to meet landscaping requirements.
D	Prunus glandulosa	Dwarf Flowering Almond All cultivar	The open habit of this plant does not meet code.
D	Pyracantha coccinea	Scarlet Firethorn All cultivar	This species fruit is very susceptible to scab (disease). Superior clones of Pyracantha are available and should be used instead of the species.
E	Rosa multiflora	Japanese Rose All cultivar	This species is a highly invasive exotic.
F	Euonymus fortunei	Wintercreeper Euonymus All cultivar	This groundcover is an aggressive invasive exotic species.
F	Polygonum cuspidatum	Japanese Knotweed All cultivar	This groundcover is an aggressive invasive exotic species.