544 Obdbe 89.— labiate. 



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



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



JL, Aug. 



iO. HEDEO'MA, Pers. American Pennyroyal. (Gr. ^6vg, sweet, 

 oajj,ri, 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. pulegioides Pers. Lus. oblong, few-toothed, peiiolate, narrowed to each end; 

 verticils' axillary, 6-flowered; cor. equaling the calyx.— <!) 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, roughish 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, oUitse; 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. braotiolata Nutt. Pubescent, simple, slender ; lvs. linear lanceolate, 

 acute at each end, entire; pedicels setaoeously bracteolate, 3 to 5-flowered; oat 

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



il. COLLINSO'MIA, L. Horse Balm. (To John CoUinson, an 

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

 toothed, lower 2-cleft ; corolla exserted, campanulate-ringent, upperlip 

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

 (rarely 4), much exserted, divergent. — 11 Herbs strong scented, with 

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

 less panicle or raceme. 



* stamens 2 perfect — the upper pair of fllamcnts minuto points Nos. 1,2 



— tlio upper pair of filaments capitate. Sotithern No. 3 



* Stamens 4 perfect, long cxsertecL Leaves very large. Soutliern Nos. 4, 5 



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

 serrate, abrupt or subcordate at base ; panicle loose, elonga(ed ; 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. 



/3. TDBEEoSA. Lvs. somewhat rhombic-oval, acute at both ends ; fls. smaller. 

 — Car to La. (Hale). (C. tuberosa Mx.) 



2 C. scabri<isotila Ait. Marly glabrous; lvs. small (18" io 3' long), acute, 

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

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

 sterile fli. 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. punctata Ell. Pubescent, lvs. large (5 to 'J' long), acuminate, rather acute 

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

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

 sterile fil. capitate. — Eioh soUs, S. Car. and Ga. (Feay). Plant 2 to 6f high. 

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

 teeth. Sept., Oct. 



4 C. vertioillata Baldw. Viscid-pubescent above ; lvs. broad-oval, acute or 

 acuminate, abrupt at base, coarsely dentate, fdlseiy verticillaie by the proximity of 

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



