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MATGRASS
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Matgrass is a slow-growing perennial bunchgrass, with tufts reaching 3 feet across or more. Leaves are grasslike, up to ¼ inch wide but appearing narrower because blades are tightly folded along the midrib. It reproduces mostly through transport of tufts in mud clinging to the hooves of grazing animals. It is a coarse-textured grass that is not palatable to most livestock. It has the ability to eliminate other vegetation within each dense tuft.

Control

Mechanical: Some land managers have aggressively pulled plants each year for a number of years, with some success.
Biological: There are no known biological control agents for matgrass.
Chemical: Herbicides can kill individual tufts, but because of their slow growth, many tufts are small and easily hidden by other vegetation. Broadcast applications of non-selective herbicides are likely needed for eradication.
Cultural: Reseeding with desirable vegetation is something to consider.
When choosing any kind of control method, assure that your choice is suited for your particular situation. Always read and follow the product label before applying any herbicide.