Invasive Plants

Lesser Celandine, Ficaria verna

Plants on the DISC list included species that are non-native to Delaware, have the potential for widespread dispersal and establishment, can out-compete other species in the same area, and have the potential for rapid growth, high seed or propagule productions and establishment in natural areas.  Each species was chosen by a committee of experts in environmental science and botany after an intensive environmental assessment.


DISC Invasive Plant List

Widespread Invasive Plants

These plants are currently invasive, cause serious management concerns or pose a serious threat to the biological diversity of Delaware (click link for a species fact sheet)

 

Multiflora rose, Rosa multiflora

Japanese honeysuckle, Lonicera japonica 

Oriental bittersweet, Celasrus orbiculatus

Japanese stilt grass, Microstegium vimineum

Japanese knotweed, Fallopia japonica

Autumn olive, Elaeagnus umbellata

Norway maple, Acer platanoides

Common reed, Phragmites australis

Hydrilla, Hydrilla verticillata

Morrow’s honeysuckle, Lonicera morrowii

Mile-a-minute weed, Persicaria perfoliata 

Yam-leaved Clematis, Clematis terniflora

Privet, Ligustrum, several species

European Sweetflag, Acorus calamus

Wineberry, Rubus phoenicolasius 


Restricted Invasive Plants

These plans are equally problematic, however they have a more localized distribution in Delaware

Japanese barberry, Berberis thunbergii

Periwinkle, Vinca minor

Garlic mustard, Alliaria petiolata

Winged euonymus, Euonymus alata

Porcelain berry, Ampelopsis brevipedunculata

Bradford pear, Pyrus calleryana

Marsh Dewflower, Murdannia keisak

Lesser celandineFicaria verna

Purple loosestrife, Lythrum salicaria

Reed canarygrass, Phalaris arundinacea

Amur honeysuckle, Lonicera maackii

Tartarian honeysuckle, Lonicera tatarica

Tree of heaven, Ailanthus altissima

Spotted knapweed, Centaruea biebersteinii 


Restricted and Potentially Invasive

Butterflybush, Buddleia davidii


Photos of Mile-a-minute and Porcelainberry kindly provided by J. Jacobini, Delaware Fish and Wildlife