ORDER 89. LABIATE. 543 



distinct, axillary cymes, apparently whorled, a little remote from each other. 

 Peduncles smooth, round, shining. Corollas pale purple. Jl, Aug. Eur. 



2 M. piperita Smith. PEPPERMINT. Lvs. smooth, ovate, and lanceolate, serrate, 

 petiolate; bracts lanceolate; cal. quite smooth at base, punctate ; spikes oblong or 

 cylindric, obtuse. Wet places, and cultivated in gardens. It has a more pene- 

 trating taste and stronger smell than the other species, pungent to the tongue, 

 followed by a sensation of coldness. The plant has a purplish stem, 2 to 3f high, 

 with scattered, deflexed hairs. Lvs. sharply serrate, dark-green. Spikes seldom 

 more than 1' in length. Cor. purplish. JL " Eur. 



3 M. arvnsis L. CORN MINT. FIELD MINT. St. ascending, much branched, 

 retrorsely hirsute ; Ivs. ovate, serrate, petiolate, acute, rounded or abrupt at base ; 

 verticils axillary; pedicels smooth; caL hirsute. Penn., Ohio, rare. St. stout, 

 often erect, about If in height Lvs. varying to oblong or ovate-lanceolate, some- 

 times nearly smooth, about twice longer (1 to 2') than wide, several times longer 

 than the petioles. Fls. small, numerous, pale purple. The plant smells like de- 

 cayed cheese. Jl. Eur. 



4 M. Canadensis L, HORSEMINT. Ascending, soft-pubescent with spreading 

 hairs; Ivs. petiolate, lanceolate, serrate, acute at each end; fls. in axillary cymes; 

 stam. generally exserted. Can. to Ky. and Penn. An herbaceous, grayish plant, 

 1 to 2f high, growing in muddy situations. St. square, usually branched and 

 beset with spreading hairs. Lvs. serrate, on opposite, downy footstalks. Fls. 

 apparently in whorls, pale purple. Calyx hairy. Aromatic like Pennyroyal but 

 less so. Jn., Jl. 



ft. BOREALIS. Plant nearly smooth. (M. borealis MX.) 



8. LYC'OPUS, L. WATER HOARHOUND. (Gr. XVKO^ a wolf, navs, a 

 loot ; a fanciful name.) Calyx tubular, 4 5-cleft; cor. subregular, 4- 

 cleft, the tube as long as the calyx, upper segment broadest, emargi- 

 nate ; sta. 2 distant, diverging, simple ; sty. straight, as long as the 

 stamens; ach. 4, obliquely truncate at apex. 2 Bog herbs, with the 

 very small fls. in axillary, dense clusters. 



1 L. Virginicus L. BUGLE WEED. Lvs. broad-lanceolate, serrate, tapering and 

 entire at both ends; cal. teeth 4, obtuse, spineless, shorter than the achenia.- Can. 

 and U. S., in wet soils. St. smooth, obtusely 4-angled, with the sides concave, 

 12 to 18' high, usually simple,, bearing small whorls of minute purplish fls. Lvs. 

 with remote, teeth-like serratures, petiolate or very slender at base. The whole 

 plant often changes to purple. It often sends out long slender runners from the 

 base. JL, Aug. 



2 L. Europaeus L. Lvs. oblong-lanceolate or lance ovate, petiolate, acute, 

 sinuate -toothed or lobed, the lower incised ; calyx teeth 5, acuminate-spinescent, longer 

 than the smooth achenia. A plant in wet places, widely diffused and exceedingly 

 variable, scarcely two specimens similar. St. 1 to 2f high, sharply angled rarely 

 stoloniferous. Lvs. 1 to 2 to 4' long, the segments quite unequal Clusters very 

 small. Aug. (L. sinuatus Ell., Benth., &c.) It dyes a permanent black. 



ft. EXALTATUS. Lower Ivs. phinatifid, with the segments subserrate ; st. usually 



tall. With the others, V. to Fla, (L. exaltatus Ph.) 

 y. ANGUSTIFOLIUS. Lvs. only serrate, narrowly lanceolate or oblong, taper- 



ing to both ends. Sometimes nearly entire ! Fls. exactly as in the other 



varieties. S. W. States. (T. angustlfolius Nutt.) 



9. CUNTLA, L. DITTANY. (The ancient Roman name for Penny- 

 royal.) Calyx 10-ribbed, equally 5-toothed, throat densely villous; 

 upper lip of corolla flat, emarginate ; stamens 2, erect, exserted, distant. 

 C. Mariana L. Lvs. ovate, serrate, subsessile ; cymes pedunculate, corymbous, 



axillary and terminal. U Grows on rocks and in dry woods, N. Y. to Ga. and 

 Ark. Stem 4-angled, mostly purple, branching, smoothish, 1 2f high. Leaves 

 small, nearly smooth, roundish or subcordate at base, tapering to a point and 

 punctate with pellucid dots. Flowers with subulate bracts at the base of the 

 3-forked pedicels. Calyx punctate. Corolla nearly twice as long as the calyx, 



