LABIATAE. 79 1 



the sacs divaricate, often hirsute on the back. [Greek, throat, from the ringent 

 corolla.] About 40 species, of the Old World. 



Upper leaves sessile or clasping. i. L. amplextcaule. 

 Leaves all petioled. 



Flowers red or purple. 



Corolla 12-18 mm. long; leaves not blotched. 2. Z,. purpureum. 



Corolla 20-25 nim. long; leaves commonly blotched. 3. L. maculatum. 



Flowers white. 4. L. album. 



1. Lamium amplexicaule L. HENBIT. (I. F. f. 3111.) Biennial or an- 

 nual, sparingly pubescent; steins weak, slender, ascending or decumbent, 1.5-5 dm. 

 long. Leaves orbicular or nearly so, coarsely crenate, 1-4 cm. wide, rounded at 

 the apex, the lower slender- petioled; flowers in axillary and terminal clusters; 

 calyx pubescent, its teeth erect, nearly as long as the tube; corolla purplish or red, 

 12-16 mm. long, its tube very slender, the lateral lobes of its lower lip very small. 

 In waste and cultivated ground, N. B. to Out., Br. Col., Fla. and Ark. Nat. from 

 Europe. Feb. -Oct. 



2. Lamium purpureum L. RED DEAD NETTLE. (I. F. f. 3112.) Annual, 

 slightly pubescent, stems decumbent, 1.5-4.5 dm. long. Leaves crenate or creii- 

 ulate, the lower orbicular or broadly ovate, rounded at the apex, cordate 

 at the base, the upper ovate, 1-4 cm. long; flowers in axillary and- ter- 

 minal clusters; calyx-teeth narrowly lanceolate, acuminate; corolla purple-red, 

 rarely exceeding 12 mm. long, the lateral lobes of its lower lip reduced to I or 2 

 short teeth. In waste and cultivated soil, R. I. to Penn. and D. C. Also in ballast 

 about the northern seaports. Nat. or adventive from Europe. April-Oct. 



3 Lamium maculatum L. SPOTTED DEAD NETTLE. (I. F. f. 3113.) Peren- 

 nial, somewhat pubescent; stems 2-5 dm. long. Leaves crenate or incised- cre- 

 nate, usually blotched, broadly ovate or triangular-ovate, truncate or cordate at the 

 base, 2-5 cm. long, or some of the lower ones much smaller and nearly orbicular; 

 clusters mainly axillary; corolla purple-red, its tube contracted near the base, 

 with a transverse ring of hairs within, the lateral lobes of its lower lip very small. 

 Along roadsides, escaped from gardens, Me. to Va. Native of Europe and Asia. 

 May- Oct. 



4 Lamium album L. WHITE DEAD NETTLE. (I. F. f. 3114.) Perennial, 

 pubescent; stems 3-5 dm. long. Leaves ovate, crenate, dentate or incised, acute 

 or acuminate, cordate or truncate at the base, 2-8 cm. long, or the lower shorter 

 and obtuse; clusters mostly axillary; corolla about 2.5 cm. long, its tube short, 

 stout, contracted near the base, with an oblique ring of hairs within, the lateral 

 lobes of its lower lip each with a slender tooth. In waste places, Ont. to Va. Nat. 

 or adventive from Europe. April-Oct. 



19 BALLOTA L. 



Perennial pubescent or tomentose herbs, some species shrubby, with dentate or 

 crenate leaves, and small bracted flowers in axillary clusters. Calyx tubular-fun- 

 nelform, lo-nerved, 5 -lO-toothed, the teeth dilated at the base, or connate into a 

 spreading limb. Corolla-tube provided with a ring of hairs within, the limb' 

 strongly 2 -lipped; upper lip erect, concave, emarginate. Anther sacs divergent 

 at maturity. Nutlets ovoid, smooth. [The Greek name.] About 30 species, of 

 the Old World. 



i. Ballota nigra L. BLACK OR FETID HOARHOUND. (T. F. f. 3115.) 

 Herbaceous, puberulent or pubescent, ill-scented; stem 4-9 dm. high, its hairs 

 mostly reflexed. Leaves slender petioled, ovate, or the lower 'nearly orbicular, 

 coarsely dentate, thin, 2-5 cm. long, clusters several-flowered, dense; bractlets 

 subulate; calyx about 8 mm. long, its teeth lanceolate, bristle-pointed, spreading 

 in fruit; corolla 12-18 mm. long, reddish purple to whitish, its upper lip pubescent 

 on both sides; nutlets shining. In waste places, Mass, to Penn. Nat. from 

 Europe. June-Sept. 



20. STACHYS L. (See Appendix.) 



Herbs, with purple yellow red or white flowers, loosely vertici Hate clustered 

 in terminal spikes, or also in the upper axils. Calyx mostly campanulate, 5-10- 



