Order 89.— LABIATE. 557 



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

 It 13 green rather than hoary, about 2f high, simple. Lvs. 2 to 3' by 6 to 9". 

 Cal. smoothish, the teetli usually purple, equaling the tube of* the purple spotted 

 corolla. JL, Aug. 



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

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

 narroived to a cordate base, petiolate ; cal. pubescent, teeth triangular, very acute, 

 shorter than the tube of the corolla or calyx. — T-J- Ohio to Tenn., along shaded bank«. 

 Plant light green, 3 to 5f high, with large leaves. St. with grooved side3 and 

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

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

 Kutt.) 



€ S. arveasio L. Annual; si. decumbent, hairy; lvs. 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, &c. Plant 

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

 cent § Eur. 



39. LEQNITRUS, L. Mother-wort. (Gr. Xeow, a lion, ovpd, tail; 

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

 toothed, teeth subspinescent ; 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 1[. 



1 L. Cardiaca L. Los. palmate-ldbed, uppermost lanceolate, often triful, all of 

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

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

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

 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 baa 

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



2 L. marrubidstrura L. Los. oblong-ovate, incisely and coarsely serrate, the floral 

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

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

 rare. A plant of vigorous growth, 2 — 4-f high, with opposite, ascending branches. 

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

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

 July, Aug. § Em'. 



40. MARRITBIUM, L. Hoariiound. Calyx tubular, 5—10 striate, 

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

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

 est, emarginate, tube included; sta. included in the tube. — 21. 



M. vulgare L. St. ascending, hoary pubescent; lv3. roundish, ovate, crenate- 

 dentate, downy caneseent 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. Xevhoc, 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, triful, middle lobe the largest ; stamens be- 

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

 axillary verticils. 



