«!82 LEONURUS. 



the general aspect of the former species and found in similar situations. The 

 herbage is often changed to dark purple. Stem 2 — 4 feet high, purple. 

 Leaves about 5 inches in length, and 3 inches wide, coarsely serrate, acumi- 

 nate. Flowers in crowded, axillary verticils, forming a long, dense, terminal 

 spike. Corolla pale purple. Stamens and style exserted. July, Aug. Per. 



Tribe 8. STACHYDE^. 



Calyx oblique or rarely mb-bilabiale. ^—lO-toothed. Corolla bilabiate, upper lip gakate or flat, 

 lower lip unequally 3-lobed. Stamens ascending, upper pair shorter. 



2 6. PHYSOSTE'GIA. 

 Calyx campanulate, subeqiially 5-toothed; corolla lube 

 much exserted, throat inflated, upper lip concave, middle 

 division of lower lip largest, roundish, emarginale; stamens 

 4. unconnected, ascending beneath the upper lip. 



Gr. (pfo-o-, a bladder, and o-rriyn, a covering; from the inflated corollas. 

 Cal. lube inflated, short. Cor. ringent, tube length of cal. throat very large, 

 exserted, oblong, inflated, the lateral seg. of lower lip erect as if belonging to 

 the throat. Fil. concealed by the upper lip. 



P. ViRGINIA'NA. Dracocephalum Virginianum. 



Spilccs dense, square ; eabix teeth nearly equal. A beautiful plant native in 



Penn. and southward, but often adorning our gardens where it spreads rapidly. 



It ia 2 3 feet high, very smooth, dark green. Stem square, thick, rigid. 



Leaves opposite, closely sessile, 4— 5 inches long, | of an inch wide with 

 remote and shallow teeth, of a shining dark green. Flowers in 4-rowed 

 spikes, numerous, dense. Bracts subulate. Corolla pale purple, about an 

 inch long, spotted inside. Aug. Sept. Per. Lions-heart 



27. LA'MIUM. 

 Upper lip of the corolla vaulted, galeate, nearly entire, 

 lower lip broad, emarginate, lateral lobes truncate, often 

 toothed on each side near the margin of the dilated throat. 



Lat. lamia, the name of a sea-monster, to which we may, if we please, 

 liken the grotesque flowers. Cal. tube dilated at mouth, with .5 mucronate 

 teeth. Cor. ringent. with a short cylindnc, crooked tube ; middle lobe of the 

 lower lip somewhat stiped or contracted at base. Fil. covered by the upper lip. 



L. amplexicau'le. 



Leaves roundish, incisely crenate, floral ones broadly cordate, obtuse, sessile, 

 amplexicaul, lower ones petiolate. A small, slender herb, found in cultivated 

 grounds. Stems ascending, several from the same root, (i — 10 inches high, 

 with opposite, short, broad, hairy leaves deeply crenate or cut; lower ones on 

 stalks an inch or more in length. Flowers in dense verticels, closely sessile 

 in the axils of the upper leaves. Calyx liairy. Corolla purple, downy, the 

 tube much exserted, the lower lip spotted with while. Naturalized. Flowers 

 from May to November. Ann. Hcnbil. 



2 8. L E G N U' R U S . 

 Calyx teeth subspinescent ; upper lip of the corolla entire, 

 hairv. concave, erect, lower lip 3-lobed, the middle lobe 

 obcordate; anthers sprinUcd with sjiinin^ dots. 



