Examples of Invasive Plants

Sources used in this page

Other lists and databases on invasive plants on the web

INVADERS database system, University of Montana http://invader.dbs.umt.edu/ - A site that tracks nonindigenous plants in the Pacific Northwest, along with compiling noxious weed lists from throughout the country. Has a helpful search tool allowing users to look up plants.

Campbell, Faith (1999) "Plants that hog the garden: invasive plants in the United States" Fine Gardening online edition http://www.taunton.com/fg/features/plants/invasive/1.htm - A supplement to an article that appeared in the February 1999 issue of the magazine; this site lists hundred of nonindigenous plants considered troublesome. Each plant has citations referring to the expert who considered this plant invasive or weedy.

California Exotic Pest Plant Council http://www.caleppc.org/info/plantlist.html - Plants considered invasive in California.

Florida Exotic Pest Plant Council http://www.fleppc.org/ - Invasive plants in in Florida.

Species Used in this site

Name

Common Name

States invasive

For Sale

Habit

Federal Noxious Weed?

Sources

Where used in this site

Acer platanoides

Norway maple

CT, DE, ID, IL (not mgt problem), MA, MD, MN, MT, NY, OR, PA, RI (extremely weedy rather than invasive), TN, VA, VT, WA, WI, WV, northeast

yes

trees

Randall and Marinelli 1996, Campbell 1999

Policies, Q12, Characteristics

Agropyron cristatum

crested wheatgrass

Canada: moderate problem in prairie provinces

yes

grass

Campbell 1999

Economic Impacts

Ailanthus altissima

stinktree, tree of heaven

AZ, CA, CT, DE, ID, IL, IN, KY, MA, MD, MT, NC, NJ, NM, NY, OH, OR, PA, TN, VA, WA, WI, WV

yes

trees

Randall and Marinelli 1996, Anderson 1961, Cronk and Fuller 1995, Hu 1979, Heisey 1990, Lawrence et al 1991, Campbell 1999

Survey, Q11

Arundo donax

giant reed

AZ, CA, NM, OR, TN, VA, WV

yes

grass

Randall and Marinelli 1996, Hoshovsky 1993a, Wagner et al 1990, Jackson et al 1994, Rieger and Kreager 1989, Campbell 1999

Ecological Impacts, Q12

Berberis thunbergii

Japanese barberry

CT, ID, IL, MA, MD, ME, MO, MT, NY, OH, OR, PA, RI, VA, TN, VT, WA, WI, WV

yes

shrubs

Randall and Marinelli 1996, Campbell 1999

Q12

Berberis vulgaris

common or European barberry

ID, IL, MA, MT, NY, PA, RI (not invasive), WA, WI

yes

shrubs

Campbell 1999

Economic Impacts

Bromus tectorum

cheatgrass, downy brome, thatch bromegrass

CA, CO, HI, ID, MT, NV, OR, PA, RI, TN, WA, WI, WV, WY; Colo. Plateau; Canada: Prairies (AB)

yes

grass

Cronk and Fuller 1995, Upadhyaya et al 1986, Billings 1994, Douglas et al 1990, Mack 1981, Pimentel et al 1999, D'Antonio and Vitousek 1992, Invasive Plants Factbook, Campbell 1999

Ecological Impacts

Carpobrotus edulis (=Mesembryanthemum edulis)

freeway iceplant; Hottentot fig

CA

herbaceous

Randall and Marinelli 1996, Campbell 1999

History

Celastrus orbiculatus

oriental bittersweet

CT, DE, IL, IN, MA, MD, MN, MO, NC, NY, PA, RI, TN, VA, VT, WI, WV, northeast; Canada: concern in ON

yes

vines

Randall and Marinelli 1996, Hillier 1983, Robertson et al 1994, NEWFS 1998, Campbell 1999

Results, Controversy, Survey, Q11, Q12, Characteristics

Centaurea maculosa

spotted knapweed

CO, CT, DE, ID, IL, MA, MD, MI, MN, MT, NC, ND, NE, NM, NY, OR, PA, TN, UT, VA, WA, WI, WV, WY; Colo. Plateau; Canada: Envt: minor

yes

herbaceous

Invasive Plants Factbook, Campbell 1999

Ecological Impacts

Cortaderia selloana

pampas grass

CA

yes

grass

Randall and Marinelli 1996, Campbell 1999

Q12

Cupaniopsis anacardioides

carrotwood

FL

yes

shrubs

Randall and Marinelli 1996, Campbell 1999

Q12

Cytisus scoparius

Scotch broom

CA, HI, ID, MA, MT, OR, PA, RI, (present; not spreading much yet), WA; Canada: Envt Canada: minor,

yes

shrubs

Randall and Marinelli 1996, Bossard and Rejmanek 1994, Wagner et al 1990, Cronk and Fuller 1995, Hoshovsky 1993b, Bossard 1991, Campbell 1999

History, Ecological Impacts, Survey, Q11, Q12

Daucus carota

Queen Anne's lace

CT, IA, ID, IL (degraded areas) MA, MI, MN, MO, MT, OH, OR, PA, RI, TN, WA, WI, WY

yes

herbaceous

Campbell 1999

Q12

Eichhornia crassipes

water hyacinth

CA, FL, GA, LA, TX

yes

aquatic

Randall and Marinelli 1996, Scmitz et al 1993, Wagner et al 1990, Cronk and Fuller 1995, Duever et al 1986, Holm et al 1991, Madsen 1997 in Luken and Thieret, Mack 1990, Campbell 1999

History, Characteristics

Elaeagnus angustifolia (=pungens)

Russian olive

AZ, CA, CO, CT, DE, ID, KS, MA, MD, MN, MT, NM, NV, OR, PA, TN, UT, VA, WA, WI, WV, WY, northeast; Colo. Plateau

yes

shrubs

Randall and Marinelli 1996, Hillier 1983, Knopf and Olson 1984, Bovy 1965, Shafroth 1995a, Campbell 1999

History, Survey, Q11, Q12

Elaeagnus umbellata

autumn olive

CT, DE, IL, IN, MA, MD, MO, NY, OH, PA, RI, VA, VT, WV, WI, northeast; Canada: concern in ON

yes

shrubs

Randall and Marinelli 1996, Hillier 1983, Wagner et al 1990, Eckardt 1993, Zimmerman et al 1993, Christensen, Campbell 1999

History, Survey, Q11, Q12

Euonymus alatus

winged euonymus; winged spindle-tree; burning bush

CT, DE, IL, IN, MA, MD, MO, OH, PA, RI, TN, VA, WI; Canada: concern in ON

yes

shrubs

Randall and Marinelli 1996, Campbell 1999

Discussion

Euphorbia esula

leafy spurge

AK, AZ, CA, CO, HI, IA, ID, IL, IN, KS, MA, MI, MN, MO, MT, NB, ND, NM, NV, OR, PA, SD, UT, VA, WA, WI, WV, WY; Colo. Plateau; Canada (prairies, local in ON);

herbaceous

The Nature Conservance 1996, Best et al 1980, Britton 1921, Lym and Messersmith 1994, Leistritz et al 1992, Lacey et al 1992, Invasive Plants Factbook, NBII, Campbell 1999

Economic Impacts

Ficus microcarpa; (=F. nitada; =retusa var. nitida)

laurel fig; Chinese or Malayan banyan

CA, FL, HI; 7

yes

trees

Randall and Marinelli 1996, Wagner et al 1990, McKey and Kaufmann 1991, Campbell 1999

Survey, Q11

Gypsophila paniculata

baby's breath

ID, MI, MT, OR, WA, WY

yes

herbaceous

Randall and Marinelli 1996, Campbell 1999

History

Hedera helix

English ivy

AL, AZ, CA, GA, HI, IA, MD, NC, OR, PA, RI, TN, WA? WI, WV; Canada: Envt: minor

yes

vines

 Randall and Marinelli 1996, Wagner et al 1990, Costello 1986, Invasive Plants Factbook, Campbell 1999

Introduction, Controversy, Q12, Characteristics

Hibiscus syriacus

shrub althea; rose-of-Sharon

AL; TN "lesser threat"

yes

shrubs

Campbell 1999

Q12

Hydrilla verticillata

Hydrilla

CA, FL, HI, MD, NC, OR, TN, VA, WA?

aquatic

yes

Schmitz et al 193, Cronk and Fuller 1995, Duever et al 1986, Madesen 1997 in Luken and Thieret, NEWFS 1998, Invasive Plants Factbook, Campbell 1999

Economic Impacts

Hypericum perforatum

common St. Johnswort, goatweed

CA, CO, ID, IL, MA, MI, MO, MT, NY, OR, PA, RI, TN?, WA, WI; Canada (BC, PQ, Maritimes)

yes

herbaceous

Campbell 1999

Survey, Q11, Introduction

Imperata cylindrica (= I. brasiliensis)

cogon grass

FL

yes

grass

yes

Randall and Marinelli 1996, Campbell 1999

Q12

Iris pseudacorus

yellow flag

ID, IL (degraded areas), MT, OR, VT, WA; Canada: Envt: minor;

yes

herbaceous

Campbell 1999

Ecological Impacts, Q12

Jasminum dichotomum

Gold Coast jasmine

FL; 7

vines

Randall and Marinelli 1996, Campbell 1999

Survey Q11

Ligustrum japonicum

wax-leaf privet, Japanese privet

FL, GA, LA, RI (present; not yet seriously invasive), TN;

yes

shrubs

Randall and Marinelli 1996, Campbell 1999

Ecological Impacts

Ligustrum sinense

Chinese privet

FL, GA, LA, NC, TN, VA; 5, 6, 8 [AL, AR, FL, GA, LA, MD, MS, NC, OH, OK, RI (present; not yet seriously invasive),

yes

shrubs

Randall and Marinelli 1996, Mowatt 1981, Campbell 1999

Survey, Q11

Lonicera japonica

Japanese honeysuckle

AK, AL, CT, DC, DE, GA, FL, HI, IL, IN, IA, LA, MA, MD, MO, NC, NJ, NY, OH, OK, PA, RI, SC, TN, VA, WI, VT, WV, northeast;

yes

vines

Randall and Marinelli 1996, Hillier 1983, Mack 1991, Schierenbect et al 1994, Sasek and Strain 1990, Campbell 1999

Survey, Q11, Discussion, History, Q12

Lonicera tatarica

Tartarian honeysuckle

CT, DE, ID, IL, IN, MA, MD, MN, MT, NY, OR, PA, RI, VA, VT, WA, WI, WV, WY; northeast; 2, 3, 4, 5, 8, 10, 15 [AR, CT, IA, IL, MA, NC, NY, OH, PA, VA, VT, WI, WV]; Canada (ON, PQ, Maritimes local)

yes

shrubs

Randall and Marinelli 1996, Woods 1993, Hillier 1983, Campbell 1999

History, Q11

Lythrum salicaria

purple loosestrife

48 continental states, possibly minus FL; Canada - national

yes

herbaceous

Randall and Marinelli 1996, Stucky 1980, Mal et al 1992, Anderson 1995, Muth and Hamburg 1998, Muth 1997, Thompson et al 1987, NBII, Invasive Plants Factbook, Campbell 1999

Survey, Q11, Introduction, Results, Methods, Discussion, Economic Impacts, Policies, Conclusions, Q12

Melaleuca quinquenervia

melaleuca; paperbark tree; swamp tea tree

FL, HI;

trees

yes

Randall and Marinelli 1996, Duever et al 1986, Wagner et al 1990, Bodle et al 1994, Cronk and Fuller 1995, Laroche and Ferriter 1992, Myers 1983, Invasive Plants Factbook, Pimentel et al 1999, Campbell 1999

Ecological Impacts

Melia azedarach

Chinaberry

FL, GA, TN, TX;

yes

trees

Randall and Marinelli 1996, Campbell 1999

Survey, Q11

Mesembryanthemum crystalinum

crystalline iceplant

CA

herbaceous

Woods 1997, Mack 1991, Cronk and Fuller 1995, Kloot 1983, Vivrette and Muller 1977, Moss 1994, Campbell 1999

Ecological Impacts

Miscanthus sinensis

zebra grass; silvergrass

NC, PA, TN, WV;

yes

grass

Randall and Marinelli 1996, Campbell 1999

Q12

Myrica faya

faya tree

HI

trees

Cuddihy and Stone 1990, Cronk and Fuller 1995, Walker and Smith 1997 in Luken and Thieret, Vitousek and Walker 1989, Vitousek et al 1987

Ecological Impacts

Nandina domestica

nandina; heavenly bamboo

FL

shrubs

Randall and Marinelli 1996, Campbell 1999

Results

Pennisetum setaceum

fountain grass

AZ, CA, HI, OR? WA?

yes

grass

Mack 1991, Cuddihy and Stone 1990, Cronk and Fuller 1995, Williams et al 1995, Campbell 1999

Q12: Pennisetum "Moudry"

Phragmites australis

Phragmites, Common Reed

Eastern Seaboard

grass

NEWFS 1998

Introduction

Pueraria montana; (=P. lobata; triloba; thunburgiana)

kudzu

AL, AR, FL, GA, IL, IN, KS, KY, LA, MD, MO, MS, NC, OH, OK, SC, PA, TN, TX, VA, WV, northeast

yes

vines

yes

Frankel 1989, Wagner et al 1990, Cronk and Fuller 1995, Frankel 1989, Sasek and Strain 1989, Sasek and Strain 1990, Invasive Plants Factbook, NBII, Campbell 1999

Introduction, Discussion, Policies, History, Q12

Rhamnus cathartica

common buckthorn

CT, IA, ID, IL, IN, MA, MD, MN, MO, MT, NY, PA, VA, VT, WI, WV, WY;

yes

shrubs

Randall and Marinelli 1996, Campbell 1999

Q11

Rhamnus frangula

glossy buckthorn; alder buckthorn

CT, IL, IN, MA, MD, MI, MN, OH, PA, RI, TN?, VA, VT, WI;

yes

shrubs

Randall and Marinelli 1996, Godwin 1943a, Catling and Porebski 1994, Campbell 1999

Q12

Rosa multiflora

multiflora rose; baby rose

AL, CT, DE, GA, IA, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, NJ, NY, OH, OR, PA, RI, TN, VA, VT, WA, WI, WV, northeast;

yes

shrubs

Randall and Marinelli 1996, Hillier 1983, Eaton 1822, Brothers and Spingarn 1992, Zimmerman et al 1993, Stiles 1982, Campbell 1999

Survey, Q11, Discussion, Q12

Rubus discolor (=R. procerus)

Himalaya berry, blackberry

CA, ID, OR, PA, WA; 4, 5, 8, 11, 12, AZ, CA, NV, OR, WA; minor in Canada

shrubs

Campbell 1999

Survey, Q11

Sapium sebiferum

popcorn tree; Chinese tallow tree

FL, GA, LA, TX; AL, FL, GA, LA, MS, NC, SC, TX

yes

trees

Randall and Marinelli 1996, Bruce et al 1995, Jones and McLeod 1989, USGS, Campbell 1999

Q12

Schefflera actinophylla; (=Brassaia actinophylla)

schefflera; Australian umbrella tree

FL, HI

yes

shrubs

Randall and Marinelli 1996, Invasives Roundtable 1999, Campbell 1999

Survey, Q11, Introduction

Schinus terebinthifolius

Brazilian pepper; Christmasberry

CA, FL, HI

yes

shrubs

Randall and Marinelli 1996, Mack 1991, Morton 1978, Wagner et al 1990, Cronk and Fuller 1995, Doren and Whitaker 1990a, Doren and Whitaker 1990b, Doren and Whitaker 1991, Campbell 1999

Economic Impacts

Sorghum bicolor

shattercane

IA, ID, MD, MT, OH, OR, PA, WA, WI

yes

grass

Campbell 1999

Economic Impacts

Sorghum halapense

Johnsongrass

AR, AZ, CA, DE, FL, ID, IL, IN, KS, KY, LA, MD, MO, MT, NM, OH, OK, OR, PA, TX, VA, WA, WV WY

yes

grass

Invasive Plants Factbook, Campbell 1999

Economic Impacts

Spartina anglica

cord grass

CA

grass

Campbell 1999

Ecological Impacts

Tamarix spp.

salt cedar; tamarisk

AZ, CA, CO, KS, MT, NB, NM, NV, OR, SD, TX, UT, WY; Colo. Plateau

trees

Randall and Marinelli 1996, Horton 1964, Cuddihy and Stone 1990, Crins 1989, DeLoach 1997 in Luken and Thieret, Walker and Smith 1997 in L &T, Barrows 1993, Sudrock 1993, Everitt and DeLoach 1990, Shafroth et al 1995b, Baum 1967, Invasive Plants Factbook, NBII, Campbell 1999

Survey Q11, Ecological Impacts, Q12, Introduction

Taraxacum officinale

common dandelion

ID, MT, OR, WA, WY; Canada: BC local

herbaceous

Campbell 1999

Economic Impacts

Taxus cuspidata

Japanese Yew

CT

shrubs

Randall and Marinelli 1996

Background on this page

Vinca minor

periwinkle

GA, IN, MD, MI, OR, PA, TN, VA, WA? WI, WV, Canada: Envt: minor

yes

vines

Randall and Marinelli 1996, Campbell 1999

History, Q12

 

Sources

Most sources found in the Species Infomation Appendix and References of JO Luken and JW Thieret, eds (1997) Assessment and Management of Plant Invasions New York: Springer.

Anderson E (1961) The tree of heaven, Ailanthus altissima. I. A blessing and a curse. Missouri Bot Gard Bull 49:105-107.

Anderson MG (1995) Interactions between Lythrum salicaria and native organisms: a critical review. Environm Managem 19:225-231

Barrows CW (1993) Tamarisk Control. II. A success story. Restoraction Managem Notes 11(1): 35-38.

Baum BR (1967) Introduced and naturalized tamarisks in the United States and Canada (Tamaricaceae). Baileya 15:19-25.

Best KF, GG Bowes, AG Thomas, MG Maw (1980) The biology of Canadian weeds. 39. Euphorbia esula L. Canad J Pl Sci 60:651-663.

Billings, WD (1994) Ecological impacts of cheatgrass and resultant fire on ecosystems in the western Great Basin. In: Monsen SB, SG Kitchen (eds) Proceedings—Ecology and Management of Annual Rangelands. USDA Forest Serv Gen Techn Rep INT-GTR 313 USDA Forest Service, Intermountain Research Station, Ogden, Utah; pp 22-30.

Bodle, MJ, AP Ferriter, DD Thayer (1994) The biology, distribution, and ecological consequences of Melaleuca quinquenervia. In: Davis SM, Ogden JC (eds) Everglades: The Ecosystem and its restoration. St Lucie Press, Delray Beach, Florida; pp. 341-355.

Bossard  CC (1991) The role of habitat disturbance, seed predation and ant dispersal on establishment of the exotic shrub Cytisus scoparius in California. Amer Midl Naturalist 126:1-13.

Bossard CC and M Rejmanek (1994) Herbivory, growth, seed production , and resprouting of an exotic invasive shrub Cytisus scoparius. Biol Conservation 67:193-200.

Bovey RW (1965) Control of Russian olive by aerial application of herbicides. J Range Managem 18:194-195.

Britton NL (1921) The leafy spurge becoming a pest. J New York Bot Gard 22:73-75.

Brothers TS and A Spingarn (1992) Forest fragmentation and alien plant invasion in central Indiana old-growth forests. Conservation Biol 6:91-100.

Bruce KA, GN Cameron, PA Harcombe (1995) Initiation of a new woodland type on the Texas Coastal Prairie by the Chinese tallow tree (Sapium sebiferum (L.) Roxb.). Bull Torrey Bot Club 122:215-225.

Campbell, F (1999) Plants that hog the garden: invasive plants in the United States. Fine Gardening online edition http://www.taunton.com/fg/features/plants/invasive/1.htm

Catling PM and ZS Porebski (1994) The history of invasion and current status of glossy buckthorn, Rhamnus frangula, in southern Ontario. Canad Field-Naturalist 108:305-310.

Christensen EM (1963) Naturalization of Russian olive (Elaeagnus angustifolia L.) in Utah. Amer Midl Naturalist 70:133-137.

Costello LR (1986) Control of ornamentals gone wild: pampas grass [Cortaderia jubata], bamboo, English and Algerian ivy [Hedera helix]. Proceedings of the 38th California Weed Conference. California Weed Conference Office, Sacramento, California; pp. 162-170.

Crins WJ (1989) The Tamaricaceae in the southwestern United States. J Arnold Arbor 70:403-425.

Cronk CB and JL Fuller (1995) Plant Invaders: The Threat to Natural Ecosystems. Chapman and Hal, London, UK.

Cuddihy LW and CP Stone (1990) Alteration of Native Hawaiian Vegetation: Effects of Humans, Their Activities and Introductions. Cooperative National Park Resources Studies Unit, Univ Hawaii, Honolulu, Hawaii.

D'Antonio CM and PM Vitousek (1992) Biological invasions by exotic grasses, the grass/fire cycle, and global change. Annual Rev Ecol Syst 23:63-87.

DeLoach CJ (1997) Biological Control of Weeds in the United States and Canada. In JO Luken and JW Thieret (eds) Assessment and Management of Plant Invasions New York: Springer; pp. 172-194.

Doren RF and LD Whitaker (1990a) Comparison of economic feasibility of chemical control strategies on differing age and density classes of Schinus terebinthifolius. Nat Areas J 10:28-34.

Doren RF and LD Whitaker (1990b) Effects of fire on different size individuals of Schinus terebinthifolius. Nat Areas J 10:107-113.

Doren RF, LD Whitaker, AM LaRosa (1991) Evaluation of fire as a management tool for controlling Schinus terebinthifolius as secondary successional growth on abandoned agricultural land. Environm Managem 15:121-129.

Douglas BJ, AG Thomas, DA Derksen (1990) Downy brome (Bromus tectorum) invasion into southwestern Saskatchewan. Canad J Pl Sci 70:1143-1151.

Duever MJ, JE Carlson, JF Meeder, LC Duever, LH Gunderson, LA Riopelle, TR Alexander, RL Myers, DP Spangler (1986) The Big Cypress National Preserve. Res Rep 6. National Audubon Society, New York.

Eaton A (1822) A manual of botany, for the Northern and Middle States of America. Websters and Skinners, Albany, New York.

Eckardt N (1993) Element Stewardship Abstract: Elaeagnus umbellata. Computer printout. The Nature Conservancy, Minneapolis, Minnesota.

Everitt JH and CJ DeLoach (1990) Remote Sensing of Chinese tamarisk (Tamarix chinensis) and associated vegetation. Weed Sci 38:273-278.

Frankel E (1989)  Distribution of Pueraria lobata in and around New York City. Bull Torrey Bot Club 116:390-394.

Godwin H (1943a) Frangula alnus Miller (Rhamnus frangula L.). J Ecol 31:77-92.

Heisey RM (1990) Evidence for allelopathy by tree-of-heaven (Ailanthus altissima). J Chem Ecol 16:2039-2055.

Hillier HG (1983) Hillier's Manual of Trees and Shrubs. Van Nostrand Reinhold, New York.

Holm LG, PL Plucknett, JV Pancho, JP Herberger (1991) The World's Worst Weeds. Krieger, Malabar, Florida.

Horton JS (1964) Notes on the Introduction of Deciduous Tamarisk. USDA Forest Serv Res Note RM-16.

Hoshovsky M (1993a) Element Stewardship Abstract: Arundo donax. Computer printout. The Nature Conservancy, San Francisco, California.

Hoshovsky M (1993b) Element Stewardship Abstract: Cytisus scoparius. Computer printout. The Nature Conservancy, San Francisco, California.

Hu SY (1979) Ailanthus. Arnoldia 39:29-50.

Invasive Plants Factbook http://www.denix.osd.mil/denix/Public/ES-Programs/Conservation/Invasive/intro.html

Invasives Roundtable. (1999) American Nurseryman, July 15, 1999, 54-77Jackson et al 1994

Jones RH and KW McLeod (1989) Shade tolerance in seedlings of Chinese tallow tree, American sycamore, and cherrybark oak. Bull Torrey Bot Club 116:371-377.

Kloot PM (1983) The role of common iceplant (Mesembruanthemum crystallinum) in the deterioration of medic pastures. Austral J Ecol 8:301-306.

Knopf FL and TE Olson (1984) Naturalization of Russian-olive: implication to Rocky Mountain wildlife. Wildlife Soc Bull 12:289-298.

Lacey JR, R Wallander, K Olson-Rutz (1992) Recovery, germinability, and viability of leafy spurge (Euphorbia esula) seeds ingested by sheep and goats. Weed Technol 6:599-602.

Laroche FB and AP Ferriter (1992) The rate of expansion of melaleuca in South Florida. J Aquatic Pl Managem 30:62-65.

Lawrence JG, A Colwell, OJ Sexton (1991) The ecological impact of allelopathy in Ailanthus altissima (Simaroubaceae). Amer J Bot 78:948-958.

Leistritz FL, F Thompson, JA Leitch (1992) Economic impact of leafy spurge (Euphorbia esula) in North Dakota. Weed Sci 40:275-280.

Lym RG and CG Messersmith (1994) Leafy spurge (Euphorbia esula) control, forage production, and economic return with fall-applied herbicides. Weed Technol 8:824-829.

Mack RN (1981) Invasion of Bromus tectorum L. into western North America: an ecological chronicle. J Freshwater Ecol 7:81-95.

Mack, Richard. (1990) Catalog of Woes. Natural History, March 1990, 45-52

Mack, Richard. (1991) The Commercial seed trade: an early disperser of weeds in the United States. Economic Botany 45(2): 257-273.

Madsen JD (1997) Methods for Management of Nonindigenous Aquatic Plants. In JO Luken and JW Thieret (eds) Assessment and Management of Plant Invasions New York: Springer; pp 145-171.

Mal Tk, J Lovett-Doust, L Lovett-Doust, GA Mulligan (1992) The bioloy of Canadian weeds. 100. Lythrum salicaria. Cand J Pl Sci 72:1305-1330.

McKey  DB and SC Kaufmann (1991) Naturalization of exotic Ficus species (Moraceae) in South Florida. In: Center TD, Doren RF, Hofstetter RL, Meyers RL, Whiteaker LD (eds) Proceedings of the Symposium on Exotic Pest Plants, Miami, Florida (Nov 1988). Techn Rep NPS/NREVER/NRTR-91/06. US National Park Service; pp 221-235.

Morton JF (1978) Brazilian pepper [Schinus terebinthifolius]—its impact on people, animals and the environment. Econ Bot 32:353-359.

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Mowatt J (1981) Control of large-leaved privet (Ligustrum lucidum) and small-leaved privet (Ligustrum sinense) in urban brushland Australia. In: Wilson BJ, Swarbrick JT (eds) Proceedings of the Sixth Australian Weeds Conference, Gold Coast, Queensland, 13-18 Sept 1981. Queensland Weed Society for the Council of Australian Weed Science Societies, Brisbane (?); pp 165-168.

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Muth, Norris Z. and Steven P. Hamburg (1998) Addressing purple loosestrife management in Rhode Island. Notheastern Naturalist 5(1): 67-74.

Myers RL (1983) Site susceptibility to invasion by the exotic tree Melaleuca quinquenervia in southern Florida. J Appl Ecol 20:645-658.

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NEWFS (1998) Invaders, New England Wild Flower: Conservation notes of the New England Wild Flower Society 2(3): 8-10.  http://www.newfs.org/invasive/invasive.htm 

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Robertson Dj, MC Robertson, T Tague (1994) Colonization dynamics of four exotic plants in a northern Piedmont natural area. Bull Torrey Bot Club 121:107-118.

Sasek TW and BR Strain (1989) Effects of carbon dioxide enrichment on the growth and morphology of kudzu (Pueraria lobata). Weed Sci 37:23-28.

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IPlants: Invasive Plants and the Nursery Industry | Meredith Hall | Center for Environmental Studies|Brown University