314 DIDYNAMIA GYMXOSPERMIA 



punctate, and rarely, if ever, proliferous,— the outer bracts shorter and more 

 ovate,— and the upper lip of the corolla with a villose tuft at apex. Both varieties 

 are indiscriminately called by the common name of Horse Mint, here. They 

 are pleasantly fragrant ; and the infusion is quite a popular remedy for calc*. 

 lous complaints. Five or six additional species arc enumerated in the U. States. 



4. Saturbja Tribe, Calyx 5-toothcd and equal, or bilabiate with the upper Up 

 3-toothed and the lower one bifid. Corolla sub-bilabiate ; upper lip erect, flat, en- 

 tire, or bifidly emarginate ; lower lip spreading, trifid, lobes nearly equal; tube 

 about as long as the calyx. Stamens 4, or sometimes 2, distant, Straight, diver- 

 ging. Satureink.«. lienth. 



273. PYCNANTHEMUM. Mx. JWtt. Gen. 509. 

 [Gr. Pyknos, dense, Ant hemon,'* flower ; the flowers being in dense cymose heads.] 



Heads of flowers surrounded by an involucre of many bracts. Calyx 

 striate, 5-toothed. Corolla with the upper lip nearly entire; lower lip 

 trifid, the middle lobe longer. Stamens distant ; anthers with paral- 

 lel cells. 



1. P. tkcanux, Mx. Leaves petiolatc, oblong-ovate, acute, sub-ser- 

 rate, tomentose-pubescent, the upper ones hoary on both sides ; flowers 

 in compound pedunculate cymose heads ; bracts subulate-linear. Beck, 

 Bot. p. 272. 



Clinopodium incanum. IVilld. Sp. 3. p. 132. Muhl. Catal p. 56. 



Hoary Ptcxanthf.mux. Vulgo — Mountain Mint Welsh Mint. 



Root perennial. Stem 2 to 4 feet high, mostly several from the root, erect, or 

 oblique, branching above, obtusely 4-angled, Tery pubescent, especially at summit. 

 Leaves an inch and half to near 3 inche3 long, and half an inch to an inch or more 

 in width, sparingly serrate, somewhat punctate; the upper ones clothed on both 

 sides with a short hoary tomentum; those below hoary-tomentose beneath, with 

 an additional soft pilose pubescence ; petioles 1 fourth to half an inch long, villose. 

 Flowers in compound heads, or compact cymes, the subdivisions on short pedun- 

 cles. Bracts longer than the calyx, setaceous, or subulate-linear, l earded at the 

 points, the outer or lower ones lanceolate. Calyx punctate; teeth acuminate. 

 Corolla whitish, or pale red, with purple spots, pubescent. Stamens exscrtcd. 

 Akenes oblong, subtriquetrous, brown, hispid at apex. 

 Hob. Hilly woodlands ; Mica-slate hills: frequent. Fl. July— Aug. Fr. Sept. 



Obs. This, and all the following species, have a pleasant aromatic odor. 



2. P. muti cum, Pers. Stem pubescent, paniculate at summit ; leaves 

 sessile, ovate-lanceolate, acute, subserrate, rounded at base, the upper 

 ones canescent ; verticils dense, mostly in terminal heads ; bracts ovate- 

 lanceolate, acuminate. Beck, Bot. p. 273. 



Brachystemum muticum. Mx. Am. 2. p. 6. Icox, tab. 32. Muhl. 

 Catal. p. 66. 



MtTTIC, OR AWNLESS PyCNASTHEMUW. 



Root perennial. Stem 2 to 3 feet high, erect, pubescent, paniculately branched 

 at summit. Leaves 1 to 3 inches long, and half an inch to an inch wide, mostly 

 denticulate, sometimes very entire, sessile or subscssile, somewhat pubescent 

 and ciliate, resinous-punctate,— the upper leaves, bracts, and branches, hoary-pu- 

 bescent. Flowers in dense terminal heads, sometimes with a compact verticil in 

 the first axil below ; bracts lanceolate, acuminate, hoary-pubescent and ciliate, 



