Source : Webster's Revised Unabridged Dictionary (1913)

   Note:

   {Corn mint} is {Mentha arvensis}.

   {Horsemint} is {M. sylvestris}, and in the United States
      {Monarda punctata}, which differs from the true mints in
      several respects.

   {Mountain mint} is any species of the related genus
      {Pycnanthemum}, common in North America.

   {Peppermint} is {M. piperita}.

   {Spearmint} is {M. viridis}.

   {Water mint} is {M. aquatica}.

   {Mint camphor}. (Chem.) See {Menthol}.

   {Mint julep}. See {Julep}.

   {Mint sauce}, a sauce flavored with spearmint, for meats.

Horsemint \Horse"mint`\, n. (Bot.)
   (a) A coarse American plant of the Mint family ({Monarda
       punctata}).
   (b) In England, the wild mint ({Mentha sylvestris}).

Source : WordNet®

horsemint
     n 1: an annual horsemint of central and western United States and
          northern Mexico [syn: {lemon mint}, {Monarda citriodora}]
     2: tall erect perennial or annual having lanceolate leaves and
        heads of purple-spotted creamy flowers; many subspecies
        grown from eastern to southwestern United States and in
        Mexico [syn: {Monarda punctata}]
     3: a coarse Old World wild water mint having long leaves and
        spikelike clusters of flowers; naturalized in the eastern
        United States [syn: {Mentha longifolia}]