212 KEY AND FLORA 



Corolla with dilated throat, upper lip arched, middle lobe of 

 the lower lip notched, the lateral lobes small, close to the 

 throat of the corolla. Stamens 4, rising beneath the upper lip. 



1. L. amplexicaule L. Henbit, Dead Nettle. An annual or 

 biennial weed. Leaves roundish, deeply scalloped, the lower ones 

 petioled, the upper sessile and clasping. Corolla sometimes | in. 

 long", downy, rose-colored or purplish. Not uncommon about gardens 

 and dooryards. Naturalized from Europe. 



2. L. purpureum L. Stem 6-18 in. high, silky -hairy or nearly 

 smooth, reclining below, branched from the base. Leaves long-peti- 

 oled, obtuse, heart-shaped, scalloped. Whorls of flowers mostly 

 terminal, crowded. Corolla |-| in. long, purple (rarely white). Nat- 

 uralized from Europe. 



VI. LEONURUS L. 



Erect herbs. Leaves lobed. Whorls of flowers axillary, 

 densely flowered, scattered ; bractlets awl-shaped ; flowers 

 small, pink or white. Calyx 5-nerved, top-shaped, with 5 

 rather spiny, spreading teeth. Corolla with upper lip erect 

 and entire, lower 3-cleft. Stamens 4 ; anthers joined in pairs. 

 Nutlets with 3 projecting angles, their sides channeled. 



1. L. cardiaca L, Motherwort. Stem 2-4 ft. high, prominently 

 angled, stiff, stout, upright, very leafy. Leaves palmately lobed or 

 cleft ; basal ones long-petioled ; lower stem leaves many-cleft, the 

 upper ones 3-cleft, prominently nerved, the divisions acute. Corolla 

 I in. long, pale rose color, the upper lip and outside of the tube 

 densely soft-bearded. Common about dooryards and fence rows. 

 Naturalized from Europe. 



VII. STACHYS L. 



Herbs, rarely shrubs. Leaves scalloped or serrate. Whorls 

 of flowers 2 or more flow^ered, usually in terminal racemes. 

 Calyx nearly bell-shaped, 5-toothed. Corolla tube cylindrical, 

 usually with a ring of hairs inside, not dilated at the throat ; 

 upper lip erect or spreading; lower spreading, 3-lobed, the 

 middle lobe largest. Stamens 4, the 2 lower longest. 



1. S. palustris L. Perennial; stem erect, 4-angled, 2-3 ft. high, 

 hairy, especially on the angles, with projecting or reflexed hairs, 

 leafy. Stem leaves short-petioled or sessile, ovate-lanceolate or ob- 

 long-lanceolate, scalloped-serrate, coarsely or finely downy, roundish 



