282 LABIATE. 



spreading, 3 -cleft, the middle lobe obcordate. Stamens 4, 

 ascending ; the lower pair longer. 



L. Cardiaca Linn. : lower stem leaves palmately divided ; upper ovate, 

 lobed ; floral cuneate-oblong, mostly trifid ; tube of the corolla with a villous 

 ring inside ; upper lip flattish, hirsutely villose. 



Waste grounds. Can. to Car. July, Aug. %. Stem 2 3 feet high, branched, 

 villous. Leaves pubescent, pale beneath. Flowers in crowded whorls, white 

 with a reddish tinge. Introduced from Europe. Common Motherwort. 



23. GALEOPSIS. Linn, Hemp Nettle.. 



(From the Greek yaXr >;. a weasel, and oi//tf, appearance ; the lips of the flower 

 resembling the snout of that animal.) 



Calyx tubular-campanulate, about 5 -nerved, 5 -toothed; the 

 teeth armed with spine-like tips, nearly equal. Corolla 2-lipped ; 

 upper lip entire, arched ; lower spreading, 3-lobed, the middle 

 lobe bifid or obcordate ; throat dilated. Stamens 4, ascending ; 

 the lower pair longer. 



G. Tetrahit Linn.: stem hispid, swollen below the joints ; leaves petio- 

 late, ovate serrate, and with the calyx smooth or hairy. 



Old fields, &c. N. S. July. %. Stem 12 feet high, retrorsely hispid, 

 branched. Flowers numerous, pate-purple, with darker spots, in whorls, which 

 are usually approximated towards the summit of the stem and branches. Ac- 

 cording to Bentham this is a very variable species, and should probably include 

 that which has been described by American botanists under the name of G. La- 

 danum. Introduced from Europe. Common Hemp Nettle. 



24. STACK YS. Linn. Hedge Nettle. 

 (From the Greek, o-ra^v?, a spike ; in allusion to its mode of flowering.) 



Calyx tubular-campanulate, 5 10-nerved, 5 - toothed ; the 

 teeth equal or the upper ones longer. Corolla 2-lipped ; upper 

 spreading and somewhat vaulted ; lower mostly longer, spread- 

 ing, 3-lobed ; the middle lobe largest. Stamens 4, ascending ; 

 the lower ones longer. 



1. S. hyssopifolia Mich. : herbaceous, smooth; stem slender, ascending; 

 leaves oblong or linear-lanceolate, sessile, remotely toothed ; whorls about 

 4-flowered ; calyx smooth ; the teeth lanceolate, acute. S. tenuifolia Willd. 



Meadows. N. Y. to Car. W. to Miss. July. 1|.. Stem 612 inches high. 

 Leaves often linear, very finely denticulate. Flowers sessile, in whorls near the 

 summit of the stem, purple. Smooth Hedge Nettle. 



2. S. aspera Mich.: stem erect, angles hairy backwards; leaves sub- 

 petiolate, lanceolate, acutely serrate, smoothish ; whorls about 6-flowered ; 

 calyx-teeth divaricate, spiny. S. arvemis Walt. S. hispida Pursh. 



Fields. Can to Car. W. to Miss. July. %.Stem about 2 feet high, spar- 

 ingly branched. Flowers in whorls, forming a terminal leafy spike, purple. 



Rouyh Hedge Nettle. 



3. S. pain stris Linn. : herbaceous, erect; stem hairy; leaves subsessile, 



