gramma

from WordNet (r) 3.0 (2006)

gramma
    n 1: pasture grass of plains of South America and western North
         America [syn: {grama}, {grama grass}, {gramma}, {gramma
         grass}]

from The Collaborative International Dictionary of English v.0.48

gramma \gram"ma\ n.
   A pasture grass of the plains of South America and western
   North America; same as {grama grass}, which see.

   Syn: grama, grama grass, gramma grass.
        [WordNet 1.5]