Source : Webster's Revised Unabridged Dictionary (1913)

Phleum \Phle"um\, n. [NL., fr. Gr. ? a kind of marsh plant.]
   (Bot.)
   A genus of grasses, including the timothy ({Phleum
   pratense}), which is highly valued for hay; cat's-tail grass.
   --Gray.

Source : WordNet®

Phleum
     n : grasses native to temperate regions [syn: {genus Phleum}]