ORDER LXXX. LABIATE LABIATE-FAMILY. 



panicles; corolla purplish-blue; stamens 4. A tall, showy plant, 85 ft. high. 

 Common in waste places and low grounds. JidyStp. 



2. V. urticifolia. 



Nettle-leaved Vervain. 



Somewhat pubescent; stem tall, erect, branching; leaves ovate, or oblong- 

 ovate, neute, coarsely serrate, petiolate, strongly nerved; flowers minute, re- 

 mote, white, sessile in elongated, very slender, axillary and terminal spikes. A 

 weed of mean appearance, with leaves somewhat resembling those of the 

 Nettle; common in waste places. Stem 2 3 ft. high. July Aug. Per. 



3. V. Aubletia. 



Garden Verbena. 



Stem weak, decumbent at base, erect above, square, viscid-pubescent, with 

 opposite branches ; leaves oval, deeply cut and toothed, on short petioles; 

 flowers large, in solitary, dense, corymbose clusters, on long peduncles ; bracts 

 downy, nearly as long us the downy calyx, narrow, persistent; corolla rose-red 

 or scarlet, with eraarginate lobes. A very pretty plant, frequent in house culti- 

 vation, often also cultivated in the open air. Stem 12 ft. high. May, and 

 all summer. 



2. PHRYMA. 



Calyx cylindrical, bilabiate ; upper lip longer, with 3 

 bristly teeth ; lower lip 2-toothed. Corolla bilabiate ; upper lip 

 emarginate ; the lower much larger, 3-lobed. Style slender. 

 Stigma 2-lobed. Fruit oblong, 1-celled, 1-seeded. Per. 



1. P. leptostachya. Lopseed. 



Stem erect, slender, square, branching, pubescent ; leaves ovate, coarsely 

 serrate, thin and large, petiolate; lower ones on long petioles; flowers op- 

 posite, rather small, in very long, slender, axillary and terminal spikes ; co- 

 rolla light purple ; pedicels of the fruit deflexed ; seed solitary, inclosed in a 

 thin pericarp, all invested by the closed calyx A rather elegant plant, 18 ft 

 high, distinguished by its long, slender spikes and deflexed fruit. Common in 

 rich woodlands. July. 



ORDER LXXX. Labiatae. Labiate-family. 



A. -Fertile Stamens 2. 



* Calyx-teeth nearly equal. 



8. LYCOPUS. Corolla with 4 nearly equal segments. 



4. MONARDA. Corolla bilabiate ; upper lip linear. 

 **'alyx distinctly bilabiate. 



5. SALVIA. Upper lip of the corolla nearly or quite entire. Connectile of 

 each anther articulated transversely to the filament ; each extremity supporting 

 1 anther-cell. 



10. COLLISSONIA. Upper lip of the corolla with 4 nearly equal lobes : lower 

 lip fringed. 



11. HBDEOMA. Upper lip of the corolla emarginate. 



B. Fertile Stamens 4, didynamous. 

 a. Calyx distinctly bilabiate, witli segments unequal in length, 



* Stamens ascending: under the upper lip of the 

 corolla. 



12. MELISSA. Lips of the calyx toothed. Lower lip 8-Iobed, the middle 

 lobe entire. Filaments simple. 



18. SCUTELLAKIA. Lips of the calyx entire. Upper sepal vaulted, in fruit 

 closing over the lower one like a lid. 



14. PRUNELLA. Middle segment of the 3-lobed lower lip, finely toothed. 

 Filaments forked, the lower portion bearing the anther. 



* * Stamens not included in the upper lip of the 

 corolla. 



T. THYMUS. Calyx hairy in the throat Upper lip of the corolla emarginate. 

 Stamens slightly exsert. 



2a TRICHOSTEMA. Upper lip of the corolla 2-lobed. Stamens much ex- 

 Bert, curved upwards in a circle. 



6. Calyx-teeth 5, nearly equal in length. 



* Stamens included beneath the upper lip of the 

 corolla. 



15. NEPETA. Corolla-tube expanded at the throat Upper lip emarginate. 

 Middle segment of the lower lip crenate. 



IT. PHYSOSTEGIA. Calyx inflated after flowering. Corolla-tube much ex- 

 serted, inflated. Upper lip nearly erect, entire. 



18. LAMIUM. Corolla-tube expanded at the throat. Upper lip vaulted, nar- 

 rowed at base. Middle segmenfrof the lower lip emarginate, contracted at base. 



19. LEONtfRtis. Upper lip of the corolla oblong, somewhat arched, entire. 

 Middle segment of the lower lip obcordate. 



20. GALEOPSIS. Upper lip of the corolla ovate, arched, entire. Middle seg- 

 ment of the lower lip obcordate, crenately toothed ; the palate with 2, teeth- 

 like processes on the upprr side. 



21. STACHYS. Upper lip of the corolla nearly erect Middle segment of 

 f he lower lip nearly entire. Stamens projecting beyond the corolla-tube. 



* * Stamens erect or ascending not included in the 

 tper lip of the corolla. 



2. MENTHA. Corolla with 4 nearly equal lobes. Stamens stialglit nearly 

 equal. 



6. PYCNA.vniF.MtrM. Calyx about 18-nerved. Upper lip of (lie, corolla flat, 

 nearly or quite entire. Lower lip with 8 obtuse lobes. Flowers in dense, many- 

 bracted whorls. 



8. SATI:REJA. Calyx 10-ribbed. Lips of tho corolla nearly equal. Flowers 

 spicate. pink. 



9. HYSSOPUS. Calyx about 15-ribl>cd. Upper lip of the corolla erect, flat, 

 emarginate. Flowers spicate, blue. 



16. LOPIIANTJIUS. Calyx 15-ribbed, obliquely 5-toothed. Upper lip of the 

 corolla flat, emarginate. Stamens exsert; lower pair shorter than the upper 

 pair. 



L'4. TBUCRIUM. Corolla 5-lobed ; 4 upper lobes nearly equal, doclinatc; 

 lower lip roundish. Stamens exsert from the cleft between the 2 uppermost 

 lobes of the corolla. 



* * * Stamens declinate. 



1. LAVANDULA. Calyx with 5 similar teeth. Upper lip of the corolla 2- 

 lobed ; lower 3-lobed. 



c. Calyx-teeth 10. 



22. MARRUBIUM. Calyx with 5 short teeth, alternating with 5 longer ones, 

 all at length spiny. 



1. LAVANDULA. 



Calyx ovoid-cylindric, with 5 short teeth ; the upper ones 

 often the largest. Upper lip of the corolla 2-lobed ; lower lip 3- 

 lobed ; lobes nearly equal. Stamens included. Per. 



1. L. spica. Lavender. 



Stem snffrnticose and branching at base; leaves linear-lanceolate, tapering 

 at base, sessile, revolute on the margin, white-downy ; the lower ones broader 

 near the extremity ; the uppermost becoming bracts, shorter than the calyx ; 

 flowers light purple, in interrupted spikes; calyx villous; corolla much exsert 

 A well-known plant, often cultivated for its powerfully aromatic and stimulant 

 properties arising from the presence of a volatile oil, which Is often used in 

 medicine. Stem 10' 18' high. July. 



2. M^NTHA. 



Calyx somewhat campanulate, with 5 nearly or quite equal 

 teeth. Corolla with a short tube included in the calyx, nearly 

 regular, 4-cleft ; upper lobe broadest, entire or emarginate. 

 Stamens 4, nearly equal, straight, distant. Achenia smooth. Per. 



1. M. Canadensis. Horsemint. 



Pubescent; stem low, ascending, simple or branching, pubescent with re- 

 versed hairs on the angles ; leaves oblong, or oblong-lanceolate, serrate, petio- 

 late, acute, tapering at base, on short, pubescent petioles ; flowers small, pale 

 purple, in dense, axillary, globular whorls ; calyx hairy ; stamens exsert A 

 plant of a grayish-green aspect, and a somewhat heavy, aromatic odor. Com- 

 mon in wet grounds and along brook-sides. Stem 1 2 ft high. July Sept 



2. M. viridis. 



Spearmint. 



Root creeping; stem smooth, erect, with erect branches; leaves subsessile, 

 ovate-lanceolate, acute, unequally serrate, smooth ; flowers pale purple, in dis- 

 tinct, axillary whorls, arranged in slender, interrupted spikes; bracts setaceous; 

 calyx-teeth somewhat hairy ; style much exsert. A very common plant, much 

 esteemed in domestic medicine. Stem 1 2 ft high. Wet grounds. July. 



3. M. piperila. 



Peppermint. 



Smooth ; stem purplish, erect, branching ; leaves ovate or ovate-lanceolate, 

 acute, serrate, petiolate, dark green ; flowers purplish, in dense, aggregated 

 whorls, forming compact spikes, interrupted below ; bracts lanceolate. A well- 

 known aromatic plant of still greater pungency, and of far more agreeable flavor 

 than the last Stem 23 ft high. Often cultivated, and sometimes natural- 

 ized in wet grounds and along brooks. July. 



3. Lt COPUS. 



Calyx tubular, 4 5-toothed. Corolla campanulate, scarcely 

 longer than the calyx, with 4 subequal lobes ; upper segment 

 broadest, emarginate. Stamens 2, distant, sometimes with 2 ste- 

 rile rudiments of stamens. Style straight Achenia smooth, 

 with thickened margins. Per. 



1. L. sinuatus. Water Hoarhound. 



Smooth ; stem sharply 4-angled, branching ; leaves oblong-lanceolate, taper- 

 ing at both ends, petiolate, sinuately-toothed ; lowest pinnatifid; uppermost 

 linear and nearly entire ; flowers small, white, in dense, axillary whorls ; calyx- 

 teeth 5, spiuescent, longer than the achenia. A light green herb, 10' 18' high, 

 resembling the Mints, but distinguished by its entire want of fragrance. Com- 

 mon in low grounds. Aug. 



