Muhlenbergia richardsonis (Trin.) Rydb.

Muhlenbergia richardsonis (Trin.) Rydb.. Muhlenbergia richardsonis, known by the common name mat muhly, is a species of grass. It is native to North America, where it can be found throughout much of Canada, Alaska, the western half of the contiguous United States through California, and in Baja California, Mexico.