6 44 ORDER 89. LABIATE. 



pubescent, palo red. Stamens and style much oxserted, of tho samo hue as the 

 corolla. Tho herb is delightfully fragrant, and used in febrifugal infusions. 

 Jl., Aug. 



10. HEDECTMA, Pers. AMERICAN PENNYROYAL. (Gr. jjdvg, sweet, 

 oafj.7], smell.) Calyx 13-striatc, gibbous at base, bilabiate, throat hairy, 

 upper lip 3-toothed, lower 2-cleft ; corolla bilabiate, upper lip erect, flat, 

 emarginatc, lower spreading, 3-lobed ; stamens 2 fertile, ascending. 

 Low, fragrant herbs. 



1 H. pulegioides Pers. Lvs. ollong, few-toothed, petiolate, narrowed to each end ; 

 verticils axillary, G-rlovvered ; cor. equaling the calyx. () A small, strong-scented 

 herb, held in high repute in the domestic materiu mediea. Stern erect, branching, 

 6' high. Leaves opposite, with 1 2 teeth each side, on very short petioles, 

 smooth on tho upper surface, roughish beneath. Calyx ciliate, 2 lower divisions 

 spined. Abundant ia dry pastures, Can. and U. S. Flowering all summer. 



2 H. hispida Ph. Lvs. Lnear, entire, sessile, obtuse; verticils about G-flowered; 

 cor. scarcely as long as the calyx. ,'l) Borders of the Mississippi and Missouri, to 

 Ark. Herb a few inches high, branching, very leafy and somewhat hairy. Lvs. 

 6" long. Cal. teeth awned. Jl. 



3 ? H. bractiolata Nutt. Pubescent, simple, slender ; Ivs. linear lanceolate, 

 acute at each end, entiro; pedicels setacoously bracteolato, 3 to 5-flowered; cal. 

 oblong, equal ; cor. minute ? Car. (Nuttall). (Micromeria ? Benth.) 



11. COLLINSfTNIA, L. HORSE BALM. (To John Collinson, an 

 English botanist.) Calyx ovoid, 10-striate, upper lip truncate, 3- 

 toothed, lower 2-cleft ; corolla cxserted, campanulate-ringcnt, upper lip 

 in 4 subcqual lobes, lower lip longer, declined, fimbriatc ; stamens 2 

 (rarely 4), much cxserted, divergent. H Herbs strong scented, with 

 large, ovate, serrate, petiolato Ivs. and yellowish fls., in a terminal, leaf- 

 less panicle or raceme. 



Stamens 2 perfect the upper pair of filaments minute points Nos. 1, 2 



the upper pair of filaments capitate. Southern No. 3 



* Stamens 4 perfect, long cxserted. Leaves very large. Southern Nos. 4, 5 



1 C. Canadensis L. Glabrous or sparsely pubescent ; Ivs. acuminate, coarsely 

 serrate, abrupt or subcordate at base ; panicle loose, elongated ; cal. teeth sub- 

 ulate, not longer than its tube ; stam. 2, cxserted. A coarse herb, in woods and 

 fields, Can. to Ky. and Car. St. 4-sided, 3 to 4f high (smooth or a little pubes- 

 cant). Lvs. thin, G to 8' long and 3 to 4' wide. Fls. in a largo compound ra- 

 ceme, with opposite branches and pedicols. Cor. 5 to G'' long, greenish-yellow, 

 the lower lip elongated and fringed. Stylo and stamens very long. Flowering 

 in summer. 



0. TUBEROSA. Lvs. somewhat rliombic-oval, acute at both ends ; fls. smaller. 

 Car to La. (Hale). (C. tuberosa MX.) 



2 C. scabriuscula Ait. Nearly glabrous; Ivs. small (18" to 3' long), acute, 

 rather abrupt at base, scabrous on the upper surface; panicle very loose, leafy at 

 base; fls. small; cal. teeth subulate, scarcely longer than its tube; stam. 2, 

 sterile til. minute. S. Car to Fla., near Savannah. Plant 2 to Gf high. Petioles 

 half as long as tho leaves. Fls. opposite. Cor. thrice as long (4 to 5") as calyx. 

 Sept. Nov. 



3 C. punctata Ell. Pubescent, Ivs. large (5 to 7' long), acuminate, rather acute 

 at base, conspicuously resinous-punctate beneath ; rac. paniculate, tho lower axil- 

 lary; fls. small; cal. teeth subulate-awned, longer than its tube; stam. 2, exserted, 

 sterile fil. capitate. Rich soils, S. Car. and Ga. (Feay). Plant 2 to Gf high. 

 Petioles a third as long as tho leaves. Cor. twice longer (4 to 5") than calyx 

 teeth. Sept., Oct. 



4 C. verticillata Baldw. Viscid-pubescent above ; Ivs. broad-oval, acuto or 

 acuminate, abrupt at base, coarsely dentate, fakely verticillats by the proximity of 

 pairs; rac. simple, elongated, ivith thefts, verticillatc; cal. teeth setaceous-pointed ; 



