Nepalese browntop

Cyperales > Poaceae > Microstegium vimineum (Trin.) A. Camus
Synonym(s): Japanese stiltgrass, Japanese grass, Mary's grass, Nepalgrass

Nepalese browntop is a delicate, sprawling, annual grass that is 0.5 to 3.5 ft. (0.2-1.1 m) in height. The leaves are pale-green, alternate, lance-shaped, 1-3 in. (2.5-7.6 cm) long, asymmetrical with a shiny, off-center midrib. Stems usually droop. Flowering occurs in late-summer, when delicate flower stalks develop in the axils of the leaves or at the apex of the stems. Most commonly an invader of forested floodplains, Nepalese browntop is also found in ditches, forest edges, fields, and trails. It is very shade tolerant and can displace vegetation native to floodplains. Nepalese browntop is native to Asia and was accidentally introduced into North America sometime around 1920. It has previously been used as packing material for porcelain, possibly explaining its accidental introduction.


Identification, Biology, Control and Management Resources

  • Weeds of the Week - USDA Forest Service, Northeastern Area, Forest Health Protection

Selected Images from Invasive.org

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Plant(s); immature plant in June
Ted Bodner, Southern Weed Science Society, Bugwood.org
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Foliage; Close-up of foliage
David J. Moorhead, University of Georgia, Bugwood.org
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Foliage;
Chuck Bargeron, University of Georgia, Bugwood.org
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Feature(s); Roots grown in greenhouse
Nancy Loewenstein, Auburn University, Bugwood.org
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Flower(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Plant(s);
Chris Evans, River to River CWMA, Bugwood.org
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Infestation; Dead along river
James H. Miller, USDA Forest Service, Bugwood.org
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Infestation; Infestation along old logging road, mixed with Chinese lespedeza
Chuck Bargeron, University of Georgia, Bugwood.org
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Infestation; Along road. Great Smoky Mountains National Park, TN.
Chris Evans, River to River CWMA, Bugwood.org
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Infestation;
Chris Evans, River to River CWMA, Bugwood.org
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Infestation;
Chris Evans, River to River CWMA, Bugwood.org
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Infestation;
Chris Evans, River to River CWMA, Bugwood.org
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Fruit(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
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Diagram or Graphic; USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Diagram or Graphic; Hitchcock, A.S. (rev. A. Chase). 1950. Manual of the grasses of the United States. USDA Misc. Publ. No. 200. Washington, DC.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Invasive Reference(s):

Check Invasive.org for most current lists.
  • Alabama - Noxious Weed Law
  • Alabama - IPC List
  • Connecticut - Noxious Weed Law
  • Georgia - EPPC list
  • Kentucky - EPPC List
  • Massachusetts - Noxious Weed Law
  • Rhode Island - Noxious Weed Law
  • South Carolina - EPPC List
  • Tennessee - EPPC List
  • Texas - Invasive Plant List
  • Virginia - Invasive Alien Plant Species
  • Mid-Atlantic - EPPC List
  • Invasive Plants: Guide to Identification and the Impacts and Control of Common North American Species
  • Invasive Plants of the Upper Midwest
  • Invasive Plant Atlas of New England
  • Invasive Plant Atlas of the Mid-South


External Links


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USDA Forest Service Bugwood University of Georgia