Mentha arvensis - Family, Mint. Color, variable, white, pink, or violet (see p. 289). The genus Mentha may be called the true mints. They are all sweet-scented with the mint odor. They are perennial herbs. Flowers of this species in whorls in the leaf-axils, none terminal. Calyx, softly hairy. Leaves, lance-shaped above, becoming broader toward the base, all finely serrate and covered with fine hairs. The odor suggests pennyroyal. Summer.
Common in rich, moist soil, widespread.