544 ORDER 89. LABIATES. 



pubescent, pale red. Stamens and style much exserted, of the same hue as the 

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

 Jl., Aug. 



10. HEDEO'MA, Pers. AMERICAN PENNYROYAL. (Gr. i]dvc, sweet, 

 ocr/z??, smell.) Calyx 13-striate, gibbous at base, bilabiate, throat hairy, 

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

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

 Low, fragrant herbs. 



1 H. ptilegioides Pers. Lvs. oblong, few-toothed, petiolate, narrowed to each end ; 

 verticils axillary, 6-flowered ; cor. equaling the calyx. CD A small, strong-scented 

 herb, held in high repute in the domestic materia medica. Stem erect, branching, 

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

 smooth on the upper surface, poughish beneath. Calyx ciliate, 2 lower divisions 

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



2 H. hispida Ph. Lvs. linear, entire, sessile, obtuse; verticils about 6-flowered; 

 cor. scarcely as long as the calyx. CD 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, entire ; pedicels setacoously bracteolate, 3 to 5-flowered ; cal. 

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



11. COLLINSO V NIA, L. HORSE BALM. (To John Collinson, an 

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

 toothed, lower 2-cleft ; corolla exserted, campanulate-ringent, upper lip 

 in 4 subequal lobes, lower lip longer, declined, fimbriate ; stamens 2 

 (rarely 4), much exserted, divergent. If. Herbs strong scented, with 

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

 less panicle or raceme. 



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



the upper pair of filaments capitate. Southern No. 3 



* Stamens 4 perfect, long exserted. 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, exserted. A coarse herb, in woods and 

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

 cent). Lvs. thin, 6 to 8' long and 3 to 4' wide. Fls. in a large compound ra- 

 ceme, with opposite branches and pedicels. Cor. 5 to 6" long, greenish-yellow, 

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

 in summer. 



ft. TUBEROSA. Lvs. somewhat rhombic-oval, acute at both ends ; fls. smaller. 

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



2 C. scabriuscula Ait. Nearly gMrrous; 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 fil. minute. S. Car to Fla., near Savannah. Plant 2 to 6f high. Petioles 

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

 Sept. Nov. 



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

 at base, conspicuously resinous-punctate beneath ; rac. paniculate, the 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 6f high. 

 Petioles a third as long as the leaves. Cor. twice longer (4 to 0") than calyx 

 teeth. Sept., Oct. 



4 C. verticillata Baldw. Viscid-pubescent above ; Ivs. broad-ova?, acute or 

 acuminate, abrvpt at base, coarsely dentate, falsely vertidllats by the proximity of 

 pairs; rac. simple, elongated, with thefls.vcrticillate; cal. teeth setaceous-pointed; 



