NOTICE: The WeedUS Database of plants invading natural areas in the U.S. (including Hawaii) has been compiled from a wide variety of sources including publications, reports, surveys, and occasional personal observations from experts in the field. Sources include the National Park Service and other federal agencies, state and local natural resource departments, The Nature Conservancy, state and regional Exotic Pest Plant Councils and related organizations, universities and others. Sources for each plant listed are provided on the table -- click on the REFERENCE(S) header to go to a legend for the source codes. The current list includes over 1,000 plants and is updated as needed. Please contact Jil Swearingen (jil_swearingen@nps.gov) regarding any errors, omissions or potential additions to the list.

The purpose of this list is informational and educational and it is neither intended nor approved for use as a regulatory tool. Many of the species on this list are economically important horticultural plants but sometimes cause problems when they escape and establish in natural areas.

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Plant Conservation Aliance - Alien Plant Working Group's

Alien Plant Invaders of Natural Areas
By Scientific Name
Species beginning with the letter L
SCIENTIFIC NAME COMMON NAME STATES NATIONAL PARKS REFERENCE(S) FACT SHEET
Lactuca canadensis Canada lettuce UT   JS Look-up Lactuca canadensis on USDA PLANTS Volunteer
Lactuca sativa garden lettuce CA DEVA JS Look-up Lactuca sativa on USDA PLANTS Volunteer
Lactuca serriola prickly lettuce AZ, CA, ID, NV, OR, SD, TN, UT, WA BADL, CHIR, CRMO, DEVA, GRCA, LAME, THRO, YELL FC, JS, PNWEPPC, TNC Look-up Lactuca serriola on USDA PLANTS Volunteer
Lactuca tatarica blue lettuce UT   JS Look-up Lactuca tatarica on USDA PLANTS Volunteer
Lagerstroemia indica crape myrtle AL, FL, GA, LA, NC, SC, VA   SR Look-up Lagerstroemia indica on USDA PLANTS In Progress
Lamiastrum galeobdolon yellow archangel OR   NPSO Look-up Lamiastrum galeobdolon on USDA PLANTS Volunteer
Lamium amplexicaule henbit AZ, MD, TN, TX, WV ANTI, FOBO, HAFE MDCES, MDDNR, JS Look-up Lamium amplexicaule on USDA PLANTS Volunteer
Lamium maculatum spotted dead nettle MD ANTI JS Look-up Lamium maculatum on USDA PLANTS Volunteer
Lamium purpureum purple dead nettle CT, MD, TN ANTI, MONO CTDEP, MDCES, MDDNR, JS Look-up Lamium purpureum on USDA PLANTS Volunteer
Landoltia punctata giant duckweed TX   EC Look-up Landoltia punctata on USDA PLANTS Volunteer
Lantana camara lantana; shrub verbena AZ, FL, HI, SC, TX HALE, ORPI ABS, FC, FLEPPC, JS, SR, TNC, UHI Look-up Lantana camara on USDA PLANTS Volunteer
Lantana montevidensis creeping lantana, purple lantana; weeping lantana AL, FL, GA, LA, NC, SC, VA   SR Look-up Lantana montevidensis on USDA PLANTS Volunteer
Lapsana communis common nipplewort HI, VA, WI HALE JS, VADCR, WIDNR Look-up Lapsana communis on USDA PLANTS Volunteer
Lathyrus latifolius everlasting pea MI, OR, WI   AAPR, NPSO, WIDNR Look-up Lathyrus latifolius on USDA PLANTS Volunteer
Lemna minor common duckweed HI HALE JS Look-up Lemna minor on USDA PLANTS Volunteer
Leontodon hirtus rough hawkbit OR   TNC Look-up Leontodon hirtus on USDA PLANTS Volunteer
Leonurus cardiaca common mothewort MI, MN   AAPR, TNC Look-up Leonurus cardiaca on USDA PLANTS Volunteer
Lepidium latifolium perennial pepperweed; broad leaf pepperwort CA, CO, CT, OR, UT, WA CANY, DINO, GLCA, GRCA, WEFA CAEPPC, CIPWG, FC, JS, PNWEPPC, TNC, WI, WIDNR Look-up Lepidium latifolium on USDA PLANTS Yes
Lepidium perfoliatum clasping pepperweed AZ, CA, ID, SD BADL, DEVA, THRO, YELL JS, TNC Look-up Lepidium perfoliatum on USDA PLANTS Volunteer
Lepidium virginicum wild peppergrass HI HALE JS Look-up Lepidium virginicum on USDA PLANTS Volunteer
Leptospermum scoparium New Zealand tea HI   UHI Look-up Leptospermum scoparium on USDA PLANTS Volunteer
Lepyrodiclis holosteoides False jagged-chickweed OR, WA   PNWEPPC Look-up Lepyrodiclis holosteoides on USDA PLANTS Volunteer
Lespedeza bicolor bicolor lespedeza, shrubby bush-clover GA, IN, KY, TN, VA COLO, GRSM FC, GAEPPC, INPAWS, KYEPPC, JS, VADCR Look-up Lespedeza bicolor on USDA PLANTS Volunteer
Lespedeza cuneata Chinese bush clover; Chinese lespedeza; sericea lespedeza AR, DC, GA, IN, KY, MD, MO, NC, NJ, NY, TN, VA, WI, WV CATO, COLO, GEWA, GRSM, MANA, NACE, PETE, PRWI, RICH, SHEN, STRI FC, GAEPPC, INPAWS, KYEPPC, MDDNR, MODOC, NCDPR, NJDA, JS, TNC, TNEPPC, VADCR, WIDNR Look-up Lespedeza cuneata on USDA PLANTS Yes
Lespedeza thunbergii Thunberg's bush-clover NJ   NJDA Look-up Lespedeza thunbergii on USDA PLANTS Volunteer
Leucaena leucocephala white lead tree; koa haole FL, HI, TX HALE FC, JS, SR, TNC, UHI Look-up Leucaena leucocephala on USDA PLANTS Volunteer
Leucanthemum vulgare ox-eye daisy, margarite AK, AZ, CA, CO, CT, KY, MD, MI, MO, MT, NJ, NY, OR, TN, WA, WI, WY ANTI, GLAC, GRCA, ROMO, STRI, YELL, YOSE AAPR, CTDEP, FC, FSAK, KYEPPC, MODOC, NJDA, JS, NPSO, PNWEPPC, TNC, WIDNR Look-up Leucanthemum vulgare on USDA PLANTS Volunteer
Ligustrum amurense Amur privet VA   SR Look-up Ligustrum amurense on USDA PLANTS Volunteer
Ligustrum japonicum Japanese privet, wax-leaf privet AR, FL, GA, KY, LA, SC, TX SAAN FC, SR, TNC Look-up Ligustrum japonicum on USDA PLANTS In Progress
Ligustrum lucidum glossy privet FL, NC, TX   FC, FLEPPC, JS, SR Look-up Ligustrum lucidum on USDA PLANTS Volunteer
Ligustrum obtusifolium border privet; blunt-leaved privet CT, DC, IL, MI, NH, NJ, PA, VA COLO AAPR, CIPWG, EU, FC, NHISC, JS, PADCNR, PERT, SR, VADCR Look-up Ligustrum obtusifolium on USDA PLANTS In Progress
Ligustrum ovalifolium California privet CT, FL, NC, PA, VA   CIPWG, SR Look-up Ligustrum ovalifolium on USDA PLANTS In Progress
Ligustrum quihoui waxy-leaf privet NC   SR Look-up Ligustrum quihoui on USDA PLANTS Volunteer
Ligustrum sinense Chinese privet AL, AR, FL, GA, KY, LA, MD, MS, NC, OH, OK, SC, TN, TX, VA BLRI, COLO, STRI, VICK FC, FLEPPC, GAEPPC, KYEPPC, NCDPR, JS, SR, TNC, TNEPPC, VADCR Look-up Ligustrum sinense on USDA PLANTS In Progress
Ligustrum vulgare common privet; European privet CT, DC, DE, IN, KY, LA, MD, MI, MS, NJ, OH, OR, PA, SC, TN, VA, VT, WA, WI, WV APCO, COLO, FRSP, GETT, GEWA, GRSM, HAFE, KIMO, NACE, PETE, RICH, SHEN AAPR, CIPWG, DNREC, FC, INPAWS, KYEPPC, JS, NPSO, PADCNR, PERT, SR, TL, TNC, TNEPPC, WIDNR Look-up Ligustrum vulgare on USDA PLANTS In Progress
Linaria dalmatica ssp. dalmatica Dalmation toadflax CO, OR, WA, WY ROMO, YELL JS, NPSO, PNWEPPC Look-up Linaria dalmatica ssp. dalmatica on USDA PLANTS In Progress
Linaria dalmatica Dalmation toadflax AZ, ID, UT, WA DINO, GRCA FC, JS, TNC Look-up Linaria dalmatica on USDA PLANTS In Progress
Linaria vulgaris common toadflax; butter-and-eggs; yellow toadflax, wild snap-dragon AK, CO, CT, MI, MT, NJ, OR, VA, WA, WI, WV, WY GLAC, HAFE, ROMO, YELL AAPR, CTDEP, FC,FSAK, NJDA, JS, NPSO, PNWEPPC, WIDNR Look-up Linaria vulgaris on USDA PLANTS Volunteer
Liriope spicatum creeping lilyturf MD, TN   MDDNR, JS Look-up Liriope spicatum on USDA PLANTS Volunteer
Lobelia chinensis Chinese lobelia NJ   NJDA Look-up Lobelia chinensis on USDA PLANTS Volunteer
Lolium arundinaceum tall fescue; tall rye grass AR, GA, ID, MO, NJ, OK, OR, TN, WA, WI GRSM, STRI, THST, YELL MODOC, JS, NJDA, PNWEPPC, TNC, WI, WIDNR Look-up Lolium arundinaceum on USDA PLANTS Yes
Lolium perenne ssp. multiflorum Italian ryegrass HI HALE JS Look-up Lolium perenne ssp. multiflorum on USDA PLANTS Volunteer
Lolium perenne perennial ryegrass, English ryegrass AZ, CA, OR, TN, TX, WA DEVA JS, PNWEPPC Look-up Lolium perenne on USDA PLANTS Volunteer
Lolium pratense meadow rye grass; tall fescue DC, IN, KY, MD, MI, MO, OH, OR, SD, TN, UT, VA, WA, WI COLO, NACE, YELL AAPR, FC, INPAWS, KYEPPC, MDDNR, JS, PNWEPPC, TNC, VADCR, WI Look-up Lolium pratense on USDA PLANTS Volunteer
Lonicera caprifolium Italian woodbine NC   SR Look-up Lonicera caprifolium on USDA PLANTS Volunteer
Lonicera etrusca Etruscan honeysuckle OR   SR Look-up Lonicera etrusca on USDA PLANTS Volunteer
Lonicera fragrantissima sweet breath of spring, January jasmine TN, VA STRI FC, JS, TNEPPC, VADCR Look-up Lonicera fragrantissima on USDA PLANTS Yes
Lonicera japonica Japanese honeysuckle CT, DC, DE, FL, GA, HI, IL, IN, KS, KY, MA, MD, MI, MO, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, VT, WI, WV ANTI, APCO, BLRI, BOWA, CATO, CHOH, COLO, CUYA, EISE, FRSP, GETT, GEWA, GRSM, HAFE, INDU, KIMO, MANA, MIMA, MONO, NACC, NACE, PETE, PRWI, RICH, ROCR, SAAN, SHEN, STRI, THST, VICK,WOTR AAPR, CIPWG, DNREC, FC, FLEPPC, GAEPPC, INPAWS, IPCNYS, KYEPPC, MDCES, MDDNR, MODOC, NCDPR, NE, NHISC, NJDA, JS, PADCNR, PERT, RINHS, SR, TL, TNC, TNEPPC, UHI, VADCR, VTDEC, WIDNR Look-up Lonicera japonica on USDA PLANTS Yes
Lonicera maackii Amur honeysuckle CT, DC, DE, GA, IN, KY, MD, MI, MO, NJ, OH, PA, TN, VA, VT, WI CHOH, COLO, GRSM, GWMP, INDU, NACE, STRI AAPR, CIPWG, DNREC, FC, INPAWS, KYEPPC, MDCES, MDDNR, MODOC, NJDA, JS, PADCNR, PERT, SR, TL, TNC, TNEPPC, VADCR, VTDEC, WI, WIDNR Look-up Lonicera maackii on USDA PLANTS Yes
Lonicera morrowii Morrow's honeysuckle CT, DC, DE, IN, KY, MA, MD, ME, MI, MO, NC, NH, NJ, NY, OH, PA, RI, TN, VA, VT, WI, WV ACAD, ANTI, CHOH, COLO, GWMP, INDU, MIMA, AAPR, CIPWG, DNREC, FC, INPAWS, IPCNYS, KYEPPC, MDCES, MDDNR, MODOC, NHISC, NJDA, JS, PADCNR, PERT, RINHS, SR, TL, TNC, TNEPPC, VADCR, VTDEC, WI, WIDNR Look-up Lonicera morrowii on USDA PLANTS Yes
Lonicera periclymenum European honeysuckle; woodbine ME, NC   SR Look-up Lonicera periclymenum on USDA PLANTS Volunteer
Lonicera standishii Standish's honeysuckle PA, VA COLO JS, PADCNR, VADCR Look-up Lonicera standishii on USDA PLANTS Yes
Lonicera tatarica Tatarian honeysuckle; Tartarian honeysuckle AR, CT, DE, IL, IN, IA, KY, MA, MD, MI, NC, NH, NJ, NY, OH, PA, RI, TN, VA, VT, WI ANTI, CHOH, COLO, INDU, SACN, YELL AAPR, CIPWG, DNREC, FC, INPAWS, IPCNYS, KYEPPC, MDCES, MDDNR, NHISC, NJDA, JS, PADCNR, PERT, RINHS, SR, TL, TNC, TNEPPC, VADCR, VTDEC, WI, WIDNR Look-up Lonicera tatarica on USDA PLANTS Yes
Lonicera x bella Bell's honeysuckle; pretty honeysucle; showy bush honeysuckle CT, IL, MD, ME, MI, NC, NH, NY, PA, RI, TN, VA, VT, WI ACAD, COLO, INDU AAPR, CIPWG, FC, JS, MDDNR, NHISC, PADCNR, RINHS, SR, TNC, TNEPPC, VADCR, WI, WIDNR Look-up Lonicera x bella on USDA PLANTS Yes
Lonicera xylosteum European fly honeysuckle CT, MA, MI, MO, NC, NJ, NY, VT   AAPR, CIPWG, SR, VTDEC Look-up Lonicera xylosteum on USDA PLANTS Yes
Lophostemon confertus vinegartree; brush box; Brisbane box HI   TNC, UHI Look-up Lophostemon confertus on USDA PLANTS Volunteer
Lotus corniculatus birds-foot trefoil CA, IL, MN, MO, OR, TN, VA, WA, WI COLO EU, FC, MODOC, JS, NPSO, PNWEPPC, TNC, VADCR, WIDNR Look-up Lotus corniculatus on USDA PLANTS Volunteer
Lotus subbiflorus hairy birdsfoot trefoil HI HALE JS Look-up Lotus subbiflorus on USDA PLANTS Volunteer
Ludwigia octovalvis primrose willow; kamole HI HALE JS Look-up Ludwigia octovalvis on USDA PLANTS Volunteer
Ludwigia palustris marsh purslane, water purslane HI HALE JS Look-up Ludwigia palustris on USDA PLANTS Volunteer
Lunaria annua annual honesty; silver dollar OR   NPSO Look-up Lunaria annua on USDA PLANTS Volunteer
Luzula luzuloides oak-forest wood-rush ME ACAD JS Look-up Luzula luzuloides on USDA PLANTS Volunteer
Lychnis flos-cuculi ragged robin, cuckoo flower CT, NJ   CIPWG, NJDA Look-up Lychnis flos-cuculi on USDA PLANTS Volunteer
Lygodium japonicum Japanese climbing fern FL, GA   ABS, FC, FLEPPC, GAEPPC, TNC Look-up Lygodium japonicum on USDA PLANTS Volunteer
Lygodium microphyllum Old World climbing fern FL EVER ABS, FC, FLEPPC, JS, NWRA, TNC Look-up Lygodium microphyllum on USDA PLANTS Volunteer
Lysimachia nummularia moneywort; creeping Jennie CT, DC, IN, MD, MI, MO, NJ, OR, PA, VA, WI, WV ANTI, CHOH, COLO, HAFE, MONO AAPR, CIPWG, FC, INPAWS, MDDNR, MODOC, NJDA, JS, NPSO, TL, TNC, VADCR, WIDNR Look-up Lysimachia nummularia on USDA PLANTS Volunteer
Lysimachia vulgaris garden loosestrife CT   CIPWG Look-up Lysimachia vulgaris on USDA PLANTS Volunteer
Lythrum salicaria purple loosestrife CT, DC, DE, ID, IN, KY, MA, MD, ME, MI, MN, MO, NC, NE, NH, NJ, NY, OH, OR, PA, RI, TN, UT, VA, VT, WA, WI ACAD, BLRI, COLO, CUYA, DEWA, GRSM, GWMP, INDU, MIMA, NACE, SACN AAPR, DNREC, FC, INPAWS, IPCNYS, KYEPPC, MDCES, MDDNR, MODOC, NCDPR, NHISC, NJDA, JS, NPSO, NWRA, PADCNR, PNWEPPC, RINHS, TL, TNC, TNEPPC, CIPWG, VADCR, VTDEC, WI, WIDNR Look-up Lythrum salicaria on USDA PLANTS Yes
Lythrum virgatum loosestrife VA   FC, PADCNR, VADCR Look-up Lythrum virgatum on USDA PLANTS Volunteer

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Last updated: 10-Apr-2007