| Japanese barberry |
USDA PLANTS Symbol: BETH USDA ARS GRIN: 6974 ITIS: 18835 |
| Berberis thunbergii DC. | |
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Taxonomic Rank: Magnoliopsida: Ranunculales: Berberidaceae |
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Japanese barberry is a small deciduous shrub from 2-8 ft. (0.6-2.4 m) tall. The thin, grooved branches have thin, straight spines. The leaves are up to 1 in. (24 mm) long and wedge-shaped. The pale-yellow flowers occur in drooping clusters of 2-5 and develop in mid-spring to early summer. The berries ripen to a bright red color and are 1/4-1/3 in. (7-10 mm) long. Japanese barberry invades a variety of habitats from shaded woodlands to open fields and wetlands. It is very shade-tolerant and can form dense stands which shade out and displace native species. Japanese barberry is rapidly spread by birds that eat the berries thus dispersing the seeds. It is native to Asia and was first introduced into The United States in 1864 as an ornamental. It is still widely planted for landscaping and hedges. |
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Identification, Biology, Control and Management Resources
- Weed of the Week - USDA Forest Service
- Weeds Gone Wild: Alien Plant Invaders of Natural Areas - Plant Conservation Alliance
- Black Stem Rust Quarantine - USDA APHIS PPQ
- Invasive Plant Atlas of New England - University of Connecticut
- Southeast Exotic Pest Plant Council Invasive Plant Manual - SE-EPPC
- Plant Invaders of Mid-Atlantic Natural Areas - National Park Service and U.S. Fish and Wildlife Service
- Fact Sheet - Pennsylvania Dept. of Conservation and Natural Resources
| Selected Images from Invasive.org | View All Images at Invasive.org |
 Plant(s); September 1997 Jil M. Swearingen, USDI National Park Service, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); April James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); April James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Purple morph Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; Britt Slattery, U.S. Fish and Wildlife Service, Bugwood.org Additional Resolutions & Image Usage |
 Stem(s); thorns and stems in April James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; fall foliage James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; Britt Slattery, U.S. Fish and Wildlife Service, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Flower(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Fruit(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Fruit(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Fruit(s); Richard Old, XID Services, Inc., Bugwood.org Additional Resolutions & Image Usage |
 Fruit(s); Barry Rice, sarracenia.com, Bugwood.org Additional Resolutions & Image Usage |
 Stem(s); April James H. Miller, USDA Forest Service, Bugwood.org Additional Resolutions & Image Usage |
 Infestation; Understory incursion. Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Seed(s); Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org Additional Resolutions & Image Usage |
 Infestation; May Steve Manning, Invasive Plant Control, Bugwood.org Additional Resolutions & Image Usage |
Taxonomic References:
- USDA, NRCS. 2001. The PLANTS Database, Version 3.1, National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Invasive Listing Sources:
- Commonwealth of Pennsylvania, Department of Conservation and Natural Resources, 1994.
- Connecticut Invasive Plant Working Group
- Delaware Natural Resources and Environmental Control, 2004
- Faith Campbell, 1998. Plants that Hog the Garden: Invasive Plants in the United States. Fine Gardening Online
- Hoffman, R. & K. Kearns, Eds. 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources, Bureau of Endangered Resources. Madison, Wisconsin. 102pp.
- Invasive Plant Council of New York State
- Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
- John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
- Maryland Cooperative Extension Service. 2003. Invasive Plant Control in Maryland. Home and Garden Information Center, Home and Garden Mimeo HG88. 4 pp.
- Maryland Department of Natural Resources, 1994
- Mid-Atlantic Exotic Pest Plant Council, 2005
- Missouri Department of Conservation,
- New Hampshire Invasive Species Committee. 2005. Guide to Invasive Upland Plant Species in New Hampshire. New Hampshire Department of Agriculture, Markets and Food Plant Industry Division and New Hampshire Invasive Species Committee.
- New Jersey Department of Agriculture, Division of Plant Industry, 2004
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- Pennypack Ecological Restoration Trust, Pennsylvania.
- Reichard, Sarah. 1994. Assessing the potential of invasiveness in woody plants introduced in North America. University of Washington Ph.D. dissertation.
- Rhode Island Natural History Society,
- Tatyana Livschultz, Pennsylvania survey of invasive plants,
- Vermont Department of Environmental Conservation,
- Virginia Department of Conservation and Recreation, 1999.
- WeedUS - Database of Plants Invading Natural Areas in the United States
- Connecticut Noxious Weeds
- Georgia Exotic Pest Plant Council Category 3
- Kentucky Exotic Pest Plant Council Significant Threat
- Massachusetts Noxious Weeds
- New Hampshire Noxious Weeds
- South Carolina Exotic Pest Plant Council Watch A
- Tennessee Exotic Pest Plant Council Significant Threat
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