ARKANSAS DEPARTMENT OF TRANSPORTATION SIGNING POLICIES AND

GUIDELINES Appendix A

An invasive plant is a species that is non-native to the ecosystem under consideration, and whose introduction, whether accidental or intentional, causes or is likely to cause harm to the environment, economy or human health. ARDOT maintenance forces allocate large portions of their time and budget removing these plant species from the right-of-way. The following non-native invasive plants are not permitted:

Scientific Name

Acer ginnala Acer platanoides Ailanthus altissima Albizia julibrissin Alliaria petiolata Alnus glutinosa Alternanthera philoxeroides (& A. sessilis) Ampelopsis brevipedunculata Arundo donax Baccharis halimifolia Berberis thunbergii Bothriochloa bladhii Bromus sterilis (& B. tectorum) Broussonetia papyrifera Buddleja davidii Carduus nutans Celastrus orbiculatus Centaurea beibersteinii Cortaderia selloana Echinochloa crusgalli Eichornia crassipes Elaeagnus spp. Eragrostis curvula Euonymus alatus Euonymus fortunei Fallopia japonica Hedera helix Holcus lanatus Hydrilla verticillata Imperata cylindrica Lespedeza bicolor Lespedeza cuneata Ligustrum sinense (& L. lucidum & L. japonicum) Lonicera japonica

Common Name

Amur maple Norway maple tree-of-heaven silktree, mimosa garlic mustard European black alder alligator weed porcelainberry giant reed saltbush Japanese barberry Causcasian bluestem cheatgrass paper mulberry butterfly bush nodding thistle Oriental bittersweet spotted knapweed pampas grass barnyard grass water hyacinth autumn/thorny olive weeping lovegrass burning bush creeping euonymus Japanese knotweed English ivy velvet grass hydrilla cogongrass shrubby lespedeza sericea lespedeza Chinese/Japanese privet Japanese honeysuckle

ARKANSAS DEPARTMENT OF TRANSPORTATION SIGNING POLICIES AND

GUIDELINES NON-NATIVE INVASIVE PLANTS continued

Scientific Name

Lonicera maackii(& L. fragrantissima & L. morrowii) Lygodium japonicum Lythrum salicaria Melia azedarach Melilotus alba (& M. officinalis) Microstegium vimineum Miscanthus sinensis Murdannia keisak Myriophyllum spicatum Nandina domestica Paulownia tomentosa Phalaris arundinacea Photinia serrulata Phragmites australis Phyllostachys aurea Poncirus trifoliata Populus alba Pueraria montana Pyrus calleryana

Common Name

bush honeysuckle Japanese climbing fern purple loosestrife Chinaberry tree sweetclover Japanese stiltgrass porcupine/zebra grass Asian spiderwort Eurasian water milfoil heavenly bamboo/nandina princess tree reed canary grass redtip photinia giant reed bamboo trifoliate orange white poplar kudzu callery pear