Chapter L: SIBIRICUS, L. Tall biennial; leaves 3-parted, the divisions

2--5-cleft, or deeply 3--7-cleft and incised; corolla (purplish) twice as long as the calyx, the upper lip fornicate, the lower little spreading.--Waste grounds, Penn.; also far west. (Adv. from Eu. and Asia.)

33. LAMIUM, L. DEAD-NETTLE.

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 [Greek: laimo/s], _throat_, in allusion to the ringent corolla.)

[*] _Annuals or biennials, low; flowers small, purple, in few whorls or heads._

L. AMPLEXICAULE, 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. PURPUREUM, L. _Leaves_ roundish or oblong, heart-shaped, crenate-toothed, _all petioled_.--N. Eng. and Penn. (Nat. from Eu.)

(Addendum) L. INTERMEDIUM, 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. ALBUM, 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.)