Stems smooth, four-angled, erect, 1 to 3 feet high from a perennial root. Leaves opposite, oblong to lanceolate in shape, with serrate margins, acute at the apex, sessile or auricled-clasping at the base, 2 to 4 inches long, one-half to 1 inch wide. Flowers violet-purple, borne solitary in the axils of the upper leaves on long, slender stalks. In fruit these stalks become 1 to 2 inches long and two to four times as long as the calyx. The calyx is prismatic, five-angled, with five slender, pointed teeth. Corolla about 1 inch long, consisting of a cylindrical tube which is longer than the calyx, and an upper and a lower lip; upper lip two-lobed and reflexed, lower lip three-lobed and spreading, the throat of the flower closed by a prominent yellow palate. The plant derives its name from the fancied resemblance of the flower to a grinning face.

In swamps, marshes, wet meadows and along streams from Nova Scotia to Manitoba, south to Virginia, Tennessee, Nebraska and Texas. Flowering from June to September.

Memoir 15 N. Y. State Museum

Plate 191

B. Square Stemmed Monkey Flower   Mimulits ringens

B. Square-Stemmed Monkey Flower - Mimulits ringens