Calyx tubular-bell-shaped, about 5-nerved, with 5 nearly equal awl-pointed teeth. Corolla dilated at the throat; upper lip ovate or oblong, arched, narrowed at the base; the middle lobe of the spreading lower lip broad, notched at the apex, contracted as if stalked at the base, the lateral ones small, at the margin of the throat. Stamens 4, ascending under the upper lip; anthers approximate in pairs, 2-celled, the cells divergent. Nutlets truncate.—Decumbent herbs, the lowest leaves small and long-petioled, the middle heart-shaped and doubly toothed, the floral subtending the whorled flower-cluster; spring to autumn. (Name from λαιμός, throat, in allusion to the ringent corolla.)
[*] Annuals or biennials, low; flowers small, purple, in few whorls or heads.
L. amplexicaùle, L. Leaves rounded, deeply crenate-toothed or cut, the upper ones clasping; corolla elongated, upper lip bearded, the lower spotted; lateral lobes truncate.—Rather common. (Nat. from Eu.)
L. purpùreum, L. Leaves roundish or oblong, heart-shaped, crenate-toothed, all petioled.—N. Eng. and Penn. (Nat. from Eu.)
(Addendum) L. intermèdium, Fries. Resembling L. purpureum, but the calyx-teeth longer than the tube, the rather narrower corolla without a hairy ring within near the base, and the nutlet longer (3 times as long as broad).—Cultivated fields near Hingham, Mass. (C. J. Sprague). (Adv. from Eu.)
[*][*] Perennial, taller; flowers larger, in several axillary whorls.
L. álbum, L. Hairy; leaves ovate, heart-shaped, petioled; calyx-teeth very slender, spreading; corolla white, the tube curved upward, obliquely contracted near the base, where there is a ring of hairs inside; lateral lobes of lower lip bearing a long slender tooth.—E. New Eng. (Nat. from Eu.)
L. maculàtum, L. Like the last, but leaves more frequently marked with a white spot on the upper face, and flowers purplish, with the ring of hairs transverse instead of oblique.—Sparingly escaped. (Adv. from Eu.)
34. GALEÓPSIS, L. Hemp-Nettle.
Calyx tubular-bell-shaped, about 5-nerved, with 5 somewhat equal and spiny-tipped teeth. Corolla dilated at the throat; upper lip ovate, arched, entire; the lower 3-cleft, spreading, the lateral lobes ovate, the middle one inversely heart-shaped; palate with 2 teeth at the sinuses. Stamens 4, ascending under the upper lip; anther-cells transversely 2-valved; the inner valve of each cell bristly-fringed, the outer one larger and naked.—Annuals, with spreading branches, and several–many-flowered whorls in the axils of floral leaves which are nearly like the lower ones. (Name composed of γαλέη, a weasel, and ὄψις, resemblance, from some fancied likeness of the corolla to the head of a weasel.)