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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Download the complete WeedUS Excel file

Plant Conservation Aliance - Alien Plant Working Group's

Alien Plant Invaders of Natural Areas
By Scientific Name
Species beginning with the letter N
SCIENTIFIC NAME COMMON NAME STATES NATIONAL PARKS REFERENCE(S) FACT SHEET
Najas minor slender-leaved naiad CT, NH, VT   CIPWG, FC, NHISC, VTDEC Look-up Najas minor on USDA PLANTS Volunteer
Nandina domestica heavenly bamboo; nandina, sacred bamboo FL, GA, NC, TN PETE, SAAN, STRI, VICK FC, FLEPPC, GAEPPC, JS, SR, Look-up Nandina domestica on USDA PLANTS In Progress
Neonotonia wightii perennial soybean HI   TNC Look-up Neonotonia wightii on USDA PLANTS Volunteer
Nepeta cataria catnip MD ANTI JS Look-up Nepeta cataria on USDA PLANTS Volunteer
Nephrolepis cordifolia tuber sword fern FL   ABS, FC, FLEPPC Look-up Nephrolepis cordifolia on USDA PLANTS Volunteer
Nephrolepis falcata fishtail fern; hi'u-I'a HI HALE JS Look-up Nephrolepis falcata on USDA PLANTS Volunteer
Nephrolepis multiflora Asian swordfern FL, HI HALE FC, FLEPPC, JS Look-up Nephrolepis multiflora on USDA PLANTS Volunteer
Nerium oleander oleander; S.A. oleander CA, FL, GA, LA, NV DEVA, LAME FC, JS, SR Look-up Nerium oleander on USDA PLANTS Volunteer
Neyraudia reynaudiana Burma reed; silk reed FL   FC, FLEPPC, TNC Look-up Neyraudia reynaudiana on USDA PLANTS Yes
Nicandra physalodes apple of Peru HI HALE JS Look-up Nicandra physalodes on USDA PLANTS Volunteer
Nicotiana glauca tree tobacco AZ, CA, FL, HI, NV, TX DEVA, HALE, LAME FC, JS, SR, TNC Look-up Nicotiana glauca on USDA PLANTS Volunteer
Nymphoides peltata yellow floating heart NH, VT   FC, NHISC, VTDEC Look-up Nymphoides peltata on USDA PLANTS Volunteer

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http://www.nps.gov/plants/alien/list/n.htm
Last updated: 10-Apr-2007