• WordNet 3.6
    • n horsemint a coarse Old World wild water mint having long leaves and spikelike clusters of flowers; naturalized in the eastern United States
    • n horsemint 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
    • n horsemint an annual horsemint of central and western United States and northern Mexico
    • ***
Webster's Revised Unabridged Dictionary
    • n Horsemint (Bot) A coarse American plant of the Mint family (Monarda punctata).
    • ***
Century Dictionary and Cyclopedia
    • n horsemint A wild mint of Europe, Mentha sylvestris.
    • n horsemint An American plant, Monarda punctata, common from New York southward.
    • ***


In literature:

The mints to flavor were horsemint, spearmint, peppermint, catmint, and heartmint.
"Customs and Fashions in Old New England" by Alice Morse Earle

In news:

Jane Diebold (left), 11, points out the Dotted Horsemint plant to Erin Miller, 5, while the two explore the butterfly garden at the Oxbow Eco-Center Thursday afternoon in Port St Lucie.
It's an evergreen salvia, and the flowers are similar to horsemint (it is a relative).