Plural of grama; any of various pasture grasses found in western North America and South America, especially those in the genus Bouteloua.
From Spanish grama, itself from Latin gramen (grass). The word entered English from Spanish colonial terminology for North American grasslands.
Grama grasses are incredibly drought-resistant and fed millions of cattle during westward expansion—these humble plants were literally the foundation that allowed the American Great Plains cattle industry to exist.
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