Japanese stiltgrass USDA PLANTS Symbol: MIVI
U.S. Nativity: Exotic
Habit: Grass or Grasslike
Microstegium vimineum (Trin.) A. Camus

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Taxonomic Rank: Liliopsida: Cyperales: Poaceae
Synonym(s): Japanese stilt grass, Japanese grass, Mary's grass, Nepalgrass, basketgrass, microstegium, Nepalese browntop, Chinese packing grass
Native Range: Asia; temp. & trop. Asia (GRIN);

Nepalese browntop is a delicate, sprawling, annual grass that is ½ to 3 ½ 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

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s); immature plant in June
James H. Miller & 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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Root(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, Illinois Wildlife Action Plan, 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.
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
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Infestation;
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
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Infestation;
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
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Infestation;
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
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Fruit(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
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Plant(s); 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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Plant(s); 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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EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

U.S. National Parks where reported invasive:
Antietam National Battlefield (Maryland)
Appomattox Court House National Historical Park (Virginia)
Blue Ridge Parkway (North Carolina)
Booker T Washington National Monument (Virginia)
Catoctin Mountain Park (Maryland)
Chesapeake and Ohio Canal National Historical Park (Maryland, Washington, D.C., and West Virginia)
Colonial National Historical Park (Virginia)
Eisenhower National Historic Site (Pennsylvania)
Fredericksburg & Spotsylvania National Military Park (Virginia)
George Washington Birthplace National Monument (Virginia)
George Washington Memorial Parkway (Virginia)
Gettysburg National Military Park (Pennsylvania)
Great Smoky Mountains National Park (North Carolina & Tennessee)
Harpers Ferry National Historical Park (West Virginia)
Manassas National Battlefield Park (Virginia)
Monocacy National Battlefield Park (Maryland)
National Capital Parks East (Washington, D.C.)
Petersburg National Battlefield (Virginia)
Prince William Forest Park (Virginia)
Richmond National Battlefield Park (Virginia)
Rock Creek National Park (Washington, D.C.)
Shenandoah National Park (Virginia)
Stones River National Battlefield (Tennessee)
Thomas Stone National Historic Site (Maryland)
Wolf Trap National Park (Virginia)



Invasive Listing Sources:
Alabama Invasive Plant Council
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
Georgia Exotic Pest Plant Council
Indiana Native Plant and Wildflower Society
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.
Kentucky Exotic Pest Plant Council
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
New Jersey Department of Agriculture, Division of Plant Industry, 2004
North Carolina Division of Parks and Recreation, Department of Environment and Natural Resources, 1998
Pennypack Ecological Restoration Trust, Pennsylvania.
South Carolina Exotic Pest Plant Council
Tennessee Exotic Pest Plant Council
Virginia Department of Conservation and Recreation, 2009