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LABIATJE. (MINT FAMILY.) 
1 . m. viriclis, L. (Spearmint.) Leaves almost sessile, ovate- 
lanceolate, unequally serrate; whorls of flowers approximate in loose 
panicled spikes; calyx somewhat hairy. 1 J. —Wet places, perfectly 
naturalized. July, Aug. 
2. M. piperita, L. (Peppermint.) Leaves petioled, ovate- 
oblong, acute, serrate; whorls crowded in short obtuse spikes, inter¬ 
rupted at the base ; calyx-teeth hairy. U — Low grounds and along 
brooks, less naturalized than the last. Aug. — Multiplying, like the 
Spearmint, by running under-ground shoots. 
3. M. arvensis, L. (Corn Mint.) Stem hairy doumicards ; 
leaves petioled, ovate or oblong, serrate ; the floral all similar and 
longer than the globose remote whorls of flowers; calyx usuall) 
hairy. If. —Sparingly naturalized in Westchester, Penn., and in 
Central Ohio. — Odor like that of decayed cheese. 
* * Truly indigenous species. 
4. M. Canadensis, L. (Wild Mint.) Stem low, spread¬ 
ing, whitish-hairy; leaves petioled, oblong, tapering to both ends, ser- 
rate, the upper narrower; flowers numerous, in globular axillary 
whorls ; calyx hairy ; stamens exserted. — Varies with smoother stems 
and shorter stamens (M. borealis, Mickx ) 1 J. —Shady brooks, com 
mon, especially northward. July - Sept. — Plant grayish-green, wit 
the odor of Pennyroyal, 1 ° -29 high. 
3. LtcOPUS, L. Water Horehound. 
Calyx oblong-bell-shaped, 4 - 5-toothed. Corolla bell-shaped, 
scarcely longer than the calyx, nearly equally 4-lobed. Stamens 
2, distant; the upper pair either sterile rudiments or wanting. 
Achenia smooth, with thickened margins. — Perennial low herb», 
differing from Mentha in being diandrous, with sharply toothe or 
pinnatifid leaves, the floral ones similar and much longer than t e 
dense axillary whorls of small flowers. Corolla mostly wblte 
(Name compounded of \vkos , a wolf, and novs, foot, from som 
fancied likeness in the leaves.) 
1. Ii. VirgriniCIlS, L. (Bugle-wef.d ) Stem obtuse ^ or 
angled, producing slender runners from the base; leaves o ° ng ^ 
ovate-lanceolate, toothed, entire towards the base, short-petio > _ 
lyx-teeth 4, ovate, blunt. — Shady moist places, common. u =c ^ 
Smooth, 10'-15' high, often purplish, with small capitate c us 
minute flowers. t 
2. L,. si unfit us, Ell. (Water Horehound.) Stem er ^’ 
sharply 4 -angled (without runners?); leaves oblong-lanceo a 
rowed at both ends, petioled ; the lowest pinnatifid, the °t' ier ®^ 5 ^ 
ate-toothed, or the uppermost linear and almost entire; calyx- 
