अर्थ : An annual horsemint of central and western United States and northern Mexico.

अर्थ : 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.

अर्थ : A coarse Old World wild water mint having long leaves and spikelike clusters of flowers. Naturalized in the eastern United States.