Invasive Species of Concern in Maryland

Water Chestnut

Trapa natans

Fills ponds and lakes from top to bottom; seeds viable for a long period of time, spiny seeds harmful to people wading

Additional Resources

	MISC Invader of the Month press release. June 2004
	Plant Invaders of Mid-Atlantic Natural Areas. National Park Service
	Maryland DNR
	Invasive.org

Alfred Colfrancesco, US Army Corps of Engineers, Bugwood.org

Fruit with sharp, half-inch long spines. Photo: Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org