LABIATE. 277 



H. pulegioides Pers. : stem erect, branched, pubescent ; leaves ovate, sub-^ 

 serrate, petiolate, narrovped at base ; w^horls axillary, about 6-flowered ; 

 corolla about as long as the calyx, Cunila pulegioides Linn. 



Dry hills and woods. Can. to Car. July, Aug. (!)• — Stem 6—12 inches high, 

 4-sided, branched above. Flowers small, pale-blue, about 3 in each opposite 

 axil. A popular and really valuable aromatic, stimulant and diaphoretic. 



Pennyroyal. 



13. MICROMERIA. i?e?ifA.— Micromeria. 

 (From the Greek hikoos, small, and [xepis, a part.) 



Calyx tubular, 13 — 15-nerved, with 5 nearly equal teeth, or 

 somewhat 2 -lipped ; the throat often villou.s. Corolla 2-lipped; 

 upper lip flattish, entire or emarginate ; the lower spreading, 

 with the lobes nearly equal, or the middle one broader. Sta- 

 mens 4, didynamous, the lower pair longer and ascending. 



M. glabella var. angustifolia Torr.: smooth; stem herbaceous, erect, 

 with prostrate suckers at the base ; radical leaves ovate, petiolate ; cauline 

 oblong-linear, obtuse ; all entire ; flowers axillary, solitary, or 2 — 5 in cymes, 

 on long pedicels. M. glabella Befitk. (excl. .syn. Mich.) Cunila glabella 

 Beck Bot. 1st. Ed. 



Limestone rocks, near Niagara Falls. W. to Miss. Aug. %. — Stems 6 — 10 

 inches high, branched from below. Corolla violet, much longer than the calyx. 

 Found by the late Dr. D. Houghton at the Falls of St. Anthony. According to 

 Dr. Torrey, the true Cunila glabella of Michaux, which occurs on rocks in 

 Tennessee, differs from the Niagara plant in being nmch larger, the leaves all 

 ovate or obovate-oblong and toothed. Niagara Thyme. 



14. MELISSA. Li7m.—Ba.\m. 

 (From the Greek iJ£\iiT(ra, a bee; because the flowers are sought by that insect.) 



Calyx tubular, 13-nerved, often striated, 2-lipped; upper lip 

 mostly spreading, 3-toothed ; lower bifid. Corolla 2-lipped ; 

 upper lip erect, flattish ; lower spreading, 3-lobed, the middle 

 lobe mostly broader. Stamens 4, ascending, mostly approx- 

 imated in pairs at the summit. 



1.. M.^ Clinopodiiim Beiith. : herbaceous, erect, villous; leaves petiolate 

 obtuse, subcrenate, rounded at base ; whorls many-flowered, depressed- 

 globose ; bracts subulate, as long as the calyx. Clinopodium vulgare Linn. 



Borders of woods. Can. to Virg. W. to Miss. July, Aug. %. — Stem 12 — 18 

 inches high, simple or sparingly branched. Flowers pale purple or rose-colored, 

 in 2 — 3 roundish depressed heads which are both axillary and terminal. Smell 

 aromatic. Introduced fron Europe. Wild Basil. 



2. M. officinalis Linn: herbaceous, erect; leaves oblong-ovate, rather* 

 acute, coarsely crenate-serrate, rugose, sometimes obtuse or cordate at base ; 

 whorls dimidiate or secund, loose, axillary ; bracts few, lance-ovate, pe- 

 tiolate. 



Read sides, &c. N. S. July, Aug. %. — Stem 1 — 2 feet high, branched, 

 more or less pubescent. Flowers in small axillary peduncled cymes, white or 



