94 



LABIATAE. 



[Vol. III. 



a 



v/. 



fhoA. '23 



18. LAMIUM L. Sp. PI. 579. 1753. 



Annual or perennial m sly tlilTuse herbs, willi erenale dentate or incised, usually cordate 

 leaves, and rather small flowers, verlicillate in axillary and terminal clusters. Calyx tubular- 

 campanulate, about 5 nerved, 5-toothed, the teeth equal or the upper ones longer. Tube of 

 the corolla mostly longer than the calyx, its limb 2-lipped; upper lip concave, erect, usually 

 entire, narrowed at the base; lower lip spreading, 3-cleft, tlig middle lobe eniarginate, con- 

 tracted at the base, the lateral ones sometimes each with a tooth-like appendage. Stamens 

 4, didynamous, ascending under the upper lip of the corolla, the anterior pair the longer; 

 anthers 2celled, the sacs divaricate, often hirsute on the back. Ovary deeply 4-parted; 

 style 2-cleft at the summit. Nutlets smooth or tuberculate. [Greek, throat, from the rin- 

 gent corolla.] 



About 40 species, natives of the Old World, known as Dead-Nettie or Hedge Dead-Nettie. 

 Upper leaves . ■sessile or clasping. i. L. amplexicauU. 



Leaves all petioled. 



Klower,s red or purple. 



Corolla 6"-9" long; leaves not blotched. 2. L. purpureum. 



Corolla io"-i 2" long; leaves commonly blotched. ^. I,, maciilalum. 



Flowers white. 4. L. album. 



I. Lamium amplexicaule L. Henbit. Greater Henbit. Henbit Dead- 

 Nettie. (Fig. 31 1 1.) 



Lamium amplexicaule I.. Sp. PI. 579. 1753. 



Biennial or annual, sparingly pubesceut; 

 stems slender, weak, branched from the 

 base or also from the lower axils, slender, 

 ascending or decumbent, 6'-i8' long. 

 Leaves orbicular or nearly so, coarsely cren- 

 ate, li'-i '2' wide, rounded at the apex, the 

 lovver slender- petioled, mostly cordate at 

 the base, the upper sessile and more or less 

 clasping; flowers rather few in axillary and 

 terminal clusters; calyx pubescent, its teeth 

 erect, uearly as long as the tube; corolla 

 purplish or red, 6"-S" long, its tube verj* 

 slender, the lateral lobes of its lower lip 

 very small, the middle one spotted; upper 

 lip somewhat pubescent. 



In waste and cultivated ground. New linins- 

 wick to Ontario and Minnesota, south to Flor- 

 ida and Arkansas. Naturalized from Europe. 

 Native also of Asia. Feb. -Oct. 



2. Lamium purpureum L. Red 



Dead Nettle. (Fig. 31 12.) 



Lamium purpureum L- Sp. PI. 579. I7,S,^- 



Atinual, slightly pubescent, branched 

 from the base and sometimes also above; 

 stems stout or slender, decumbent, 6'-iS' 

 long. Leaves crenatc or crenulate, the 

 lower orbicular or broadly ovate, slender- 

 petioled, rounded at the apex, cordate at 

 the base, the upper ovate, shott-petioled, 

 sometimes acute at the apex, ^^'-i.V 

 long; flowers in axillary and terminal 

 clusters; calyx teeth narrowly lanceolate, 

 acuminate, slightly longer than the tube, 

 spreading, at least in fruit; corolla pur- 

 ple-red, rarely exceeding J<' long, its tube 

 rather stout, the lateral lobes of its lower 

 lip reduced to i or 2 short teeth, its middle 

 lobe spotted; upper lip very pubescent. 



In waste and cultivated soil. Rhode Island to Pennsylvania. Also in ballast about the northern 

 seaports. Naturalized or adventive from Jiurope. Native also of Asia. Old names. Red or Sweet 

 Archangel, Day-, Dog-, French-, or Deaf-nettle, Rabbit-meat. April-Oct. 



