Holy grass
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(Bot.) | a sweet-scented grass (Hierochloa borealis and Hierochloa alpina). In the north of Europe it was formerly strewed before church doors on saints' days; whence the name. It is common in the northern and western parts of the United States. Called also vanilla grass or Seneca grass. |
See also: Holy
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.