94 



LABIATAE. 



[Vol. III. 



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



Annual or perennial nijS.ly diffuse herbs, with creuate dentate or incised, usually cordate 

 leaves, and rather small flowers, verticillate iu 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, the middle lobe emarginate, con- 

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

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

 anthers 2-celled, 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. 1. L. am pie xi caul e. 



Leaves all petioled. 



Flowers red or purple. 



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



Corolla io"-i2" long; leaves commonly blotched. 3. L. macula turn. 



Flowers white. 4. L. album. 



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

 Nettle. (Fig. 31 1 1.) 



Lamium amplexicaule L. Sp. PI. 579. 1753. 



Biennial or annual, sparingly pubescent; 



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, y&'-ity wide, rounded at the apex, the 



lower 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, nearly as long as the tube; corolla 



purplish or red, 6 // -8 // long, its tube very 



slender, the lateral lobes of its lower lip 



very small, the middle one spotted; upper 



lip somewhat pubescent. 



In waste and cultivated ground, New Bruns- 

 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. 1753. 



Annual, slightly pubescent, branched 

 from the base and sometimes also above; 

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

 long. Leaves crenate or crenulate, the 

 lower orbicular or broadly ovate, slender- 

 petioled, rounded at the apex, cordate at 

 the base, the upper ovate, short-petioled, 

 sometimes acute at the apex, Yz'-\ l l' 

 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 y z ' long, its tube 

 rather stout, the lateral lobes of its lower 

 lip reduced to 1 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 Europe. Native also of Asia. Old names, Red or Sweet 

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



