ORDER 89. LABIATE. 557 



slender and smooth in aspect than the preceding, yet technically scarcely different 

 It is green rather than hoary, about 2f high, simple. Lvs. 2 to 3' by 6 to 9". 

 Cal. smootliish, the teeth usually purple, equaling the tube of the purple spotted 

 corolla. Jl., Aug. 



5 S. Nuttalliana Shuttles St. stout, ereci, often branched, hispid with bristly, 

 spreading hairs; Ivs. elliptical-ovate, acuminate, crenate^serrate, sparsely hispid, 

 narrowed to a cordate bass, petiolate ; cal. pubescent, teeth triangular, very acute, 

 shorter than the tube of the corolla or calyx. % Ohio to Teoa., along shaded banks. 

 Plant light green, 3 to 5f high, with largo leaves. SU with grooved sides and 

 hispid angles. Lvs. 4 to 9' by 18" to 40". Verticils remote. Cor. light red, 

 with purple stripes and dots, the tube much exsertedv JL, Aug. (S. sylvatica 

 Nutt.) 



6 S. arvensis L. Annual; st. decumbent, hairy; Ivs. ovate, cordate, petiolate, 

 obtuse, crenate, the highest shorter than the lanceolate, acute teeth of the hispid 

 calyx ; cor. tube included, lips short. In waste grounds near Boston, Ac. Plant 

 slender, 3' to If long, with long, spreading hairs. Lvs. 1' or less. Cor, pubes- 

 cent Eur. 



39. LEONITRUS, L. MOTHER-WORT> (Gr, AtW, a lion, ovpd, tail; 

 from the appearance of tlie spikes of flowers.) Calyx 5 to 10-striate, 5- 

 toothed, teeth subspinescent 5 upper lip of the corolla entire, hairy, con- 

 cave, erect, lower lip 3-lobed, the middle lobe obcordate ; stamens 4, 

 ascending beneath the upper lip. Mostly 2{ 



1 L. Cardiaca L. Lvs. palmate-lobed, uppermost lanceolate-, often trifld, all of 

 them tooihed, cuneiform at base ; cor. longer than the calyx, the tube with a 

 hairy ring within. Tartary, whence it was first introduced into Europe and thenco 

 to America, ever following the footsteps of civilized man. Common in waste 

 places. Stem 3 5f high, downy, square, large, purplish, bearing its opposite, 

 stalked, rough leaves arranged in 4 vertical rows. Fls. in many whorls. Calyx 

 rigid and bristly. Cor. purplish, hairy without, variegated within. July. It has 

 reputation as an ingredient in herb drinks for colds, coughs, &o. 



2 L. marrubiastrum L. Lvs. oblong-ovate, incisely and coarsely serrate, the floral 

 lanceolate, tapering at each end, incisely dentate ; cor. shorter than tho calyx 

 teeth, tube naked within, upper lip somewhat vaulted, pubescent. Penn., Ind., 

 rara A plant of vigorous growth, 2 4f high, with opposite, ascending branches. 

 Leaves 2 3' in length, tho lowest on long petioles. Verticils many-flowered, 

 remote but numerous, forming an interrupted, leafy spike. Corolla reddish white. 

 July, Aug. Eur. 



40. MARRITBIUM, L. HOARIIOUND. Calyx tubular, 5 10 striatc, 

 with 5 or 10 subequal teeth; cor. bilabiate, tipper lip erect, flattish or 

 concave, entire or bifid, lower lip spreading, 3-lobed, middle lobe broad- 

 est, emarginate, tube included ; sta. included in the tube. 2. 



M. vulgare L. St. ascending, hoary pubescent; Ivs. roundish, ovate, crenate- 

 dentate, downy ca&esceut beneath; cal. of 10 setaceous, uncinate teeth. Fields 

 and roadsides. St. 1 to 2f high, branching at base, or several from the same root. 

 Lvs. petiolate, 1 to 2' diam., whitish and rough veined above, very woolly bo- 

 neath, rounded and toothed. Fls. white, in sessile, axillary, dense, hairy verticils. 

 Cal. woolly, the teeth spreading and alternately shorter. Jl., Aug. Eur. "Well 

 known as an ingredient in cough candy. 



41. LEU'CAS, L. (Gr. Aev/c6f, white; the usual color of the densely 

 woolly flowers.) Calyx tubular, 8 to 10-toothed, subequal; corolla 

 tube included, upper lip concave, erect, entire, very hairy without, the 

 lower longer, spreading, trifid, middle lobe the largest ; stamens be- 

 neath the galea ; filaments not appendaged, achenia 3-augled. Fls. in 

 axillary verticils. 



