mat-grass

from The Century Dictionary.

• noun In Australia, Manisuris compressa, a grass with creeping or ascending flattened stems, esteemed for pasturage and said to keep green the whole year in dry climates.
• noun Same as tussock-grass, 2.
• noun Same as matweed.
• noun A European grass, Nardus stricta, which grows abundantly on moors and heaths in short tufts. It is worthless for agricultural purposes, except as affording a natural pasturage for sheep. Also called nard.