Click on image to enlarge.
Scientific name: : : : :
Common Name: Alien, Invasive Organisms of the Washington, D.C.
Photographer: E. M. Barrows
Identifier: E. M. Barrows
Figure 1. A large tangle of woody stems of Porcelainberry in late winter in Glover-Archbold Park, Washington, D.C. Later in the year this species will produce a dense carpet of leaves over the area.
Alien, invasive species have many effects on our native species and Humans.
Table. Some effects of alien, invasive species in the Washington, D.C., Area ______________________________________________________________________________
competition for nutrients (e.g., some bird, many plant and insect species)
competition for pollinators (e.g., many plant species)
competition for light (e.g., many plant species)
competition for space (e.g., some bird species, many plant species — English Ivy, English Sparrows, Starlings)
competition for water (e.g., many plant species)
parasitization of native species (e.g., some fungus species — Chestnut Blight, Dutch Elm Disease)
predation of native species (e.g., some insect species (Multicolored-Asian Lady Beetle) ______________________________________________________________________________
Table. Some main alien, invasive species in the Washington, D.C., Area ______________________________________________________________________________
Acorus calamus, Sweetflag (forb)
Aedes albopictus, Asian Tiger Mosquito
Ailanthus altissima, Tree-of-heaven (tree)
Alliaria petiolata, Garlic Mustard (forb)
Ampelopsis brevipedunculata, Porcelainberry (vine)
Celastrus orbiculatus, Asiatic Bittersweet (vine)
Epilachna varivestis, Mexican Bean Beetle
Euonymus fortunei, Winter-creeper (vine)
Exomala orientalis (= Anomala orientalis), Oriental Beetle
Forficula auricularia, European Earwig (insect)
Harmonia axyridis, Multicolored-Asian Lady Beetle
Hedera helix, English Ivy (vine)
Lymantria dispar, Gypsy Moth
Lonicera japonica, Japanese Honeysuckle (vine)
Lonicera maacki, Armur Honeysuckle (tree)
Myocastor coypus, South American Nutria
Paratrechina flavipes, Chinese Paratrechina Ant
Passer domesticus, English Sparrow
Pieris rapae, Imported Cabbage Butterfly
Polygonum perfoliatum, Mile-a-minute Vine (vine)
Popillia japonica, Japanese Beetle
Pueraria lobata, Kudzu-vine (vine)
Ranunculus ficaria, Lesser Celandine (forb)
Sturnella vulgaris, Starling (bird) ______________________________________________________________________________
Please click here to go to Weeds Gone Wild for fact sheets on plants in this table, a list of invasive plants of the US, and related information.