122 



LABIATAE. 



Vol. III. 



Lamium hybridum Vill., occasionally found in waste and cultivated grounds, 

 Europe, differs by its more deeply and incisely toothed leaves. 



introduced from 



3. Lamium maculatum L. 



Spotted Dead Nettle. 

 Fig. 3612. 



Variegated Dead Nettle. 



L. maculatum I.. Sp. PI. Ed. 2, 809. 1763. 



Perennial, somewhat pubescent ; stems 

 mostly slender, commonly branched, de- 

 cumbent or ascending, 8-1 3 long. Leaves 

 crenate or incised-crenate, all petioled, usu- 

 ally longitudinally blotched along the mid- 

 rib, broadly ovate or triangular-ovate, 

 acute or obtuse, truncate or cordate at the 

 base, 1-2' long, or some of the lower ones 

 much smaller and nearly orbicular ; clusters 

 few-flowered, mainly axillary ; calyx-teeth 

 lanceolate-subulate, as long as or longer 

 than the tube, spreading; corolla io"-i2" 

 long, purple-red, its tube short, 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, 

 Maine and Vermont to Virginia. Native of 

 Europe and Asia. May-Oct. 



4. Lamium album L. White Dead 

 Nettle. Fig. 3613. 



Lamium album L. Sp. PI. 579. 1753. 



Perennial, pubescent; stems decumbent or 

 ascending, rather stout, simple or branched, 

 i-li long. Leaves ovate, crenate, dentate 

 or incised, all petioled, acute or acuminate at 

 the apex, cordate or truncate at the base, 

 1 '-3' long, or the lower shorter and obtuse; 

 clusters mostly axillary ; calyx-teeth very 

 slender, subulate, spreading, usually longer 

 than the tube; corolla white, about 1' long, 

 its tube short, stout, contracted near the base, 

 with an oblique ring of hairs within, the lat- 

 eral lobes of its lower lip each with a slender 

 tooth. 



In waste places, Ontario to Massachusetts and 

 Virginia. Also in ballast about the northern sea- 

 ports. Naturalized or adventive from Europe. 

 Old names, white archangel; day-, blind-, dumb- 

 or bee-nettle ; snake-flower, suck-bottle. April- 

 Oct. 



20. BALLOTA L. Sp. PI. 582. 1753. 

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

 leaves, and small bracted flowers in axillary clusters. Calyx tubular-funnelform, 10-nerved, 

 5-10-toothed, the teeth dilated at the base, or sometimes connate into a spreading limb. 

 Corolla-tube about as long as the calyx, provided with a ring of hairs within, the limb 

 strongly 2-lipped ; upper lip erect, concave, emarginate, lower lip spreading, 3-lobed, the 

 middle lobe emarginate or obcordate. Stamens 4, didynamous, ascending under the upper 

 lip of the corolla, the anterior pair the longer; anther-sacs divergent at maturity. Ovary 

 deeply 4-lobed ; style 2-cleft at the summit. Nutlets ovoid, smooth. [The .Greek name.] 



About 30 species, natives of the Old World, most numerous in the Mediterranean region, the 

 following typical. 



