68 DIDYNAMIA. GYMNOSPERMIA. 



226. MARRUBIU.u. Nutt. Gen- 507. 



t" A voce hebraioa Mar rob, quod amaruni succum significat " Boerh-1 



Cal. salverform, 10 striate, rigid. Cor. upper lip bifid, linear, straight. 



M. VL'LGARE. EU. Leaves roundish-ovate, crenate-dentate, rugose-veined; calyx teeth setaceous, undnatdi« 

 J-^u/g-o— Hoar-hound. 



Fl. Beginning of July, and after. Fr- mat. Middle of August^ and after. 



Uab- Dry, stony banks, about houses. Sec. frequent. 9 to 18 inches high: flowers white. 



Obs. Tliis foreign plant, though naturalized in many localities, does not seem to extend itself very fast. 

 It IS a well icnown, and deservedly esteemed tonic; and when preoared in the form of a syrup, is an ex- 

 cellent pectoral medicine. ^ 



227. LAMIUM. NulL Gen. 500. 

 [Obscure: BocrJi. says, " a Lamia pisce, quia hujus piscis horrendum vultum refert."] 

 Cor. upper lip entire, vaulted; loWer lip 2 lobed; margin of the throat toothed on each side- 

 L. AMn.ExiCAtTLE. U'g. Lower leaves petiolatc; floralleavessessilcj amplexicaul, obtuse. 

 Fu/g-o— Dead-nettle. Hen-bit. Archangel. 



.Fl. Middle of April, and after. Fr. mat. June, and aftef. 



Jlab- Gardens; grain fields, &c. common. 9 to 15 inches long: flowers purple. 



Obs- This is a naturalized foreigner; and often continues green through our wintel-?- I have observed 

 the small flowers, mentioned in Withering, putting forth in the month of February. 



22S. GLECHOMA. Nutt. Gen. 506. 

 CAn ancient name, perhaps from the Gr- Gkikus, sweet, or pleasant; in reference to its odor. See De Theis"] 



Cor. upper lip bifid, lower trifid, middle segment emarginate: each pair of ^?iZ/j«-s forming a cross. 

 G. HEDERACEA. IVg. Stem procumbent, radicating; leaves cordate-reniform, crenste- 

 Fit/g-o— Ground Ivy. Ale-hoof. Gill. 



Fl. Latter end of April, and after. Fr. mat. 



Uab. Fence-rows; orchards, and shaded places: frequent. 6" to 18 inches long: flowers mostly blue. 



063. Mr. JSTuttall supposes it to be indigenous, along the Ohio, Potomac, &c. but it is evidently OKlv 

 naturahzeci in this vicmity . Withering says it was generally used to clarify, and give ajlavor to Ale, till 

 thereignol Henry the iuighth; about which peiiod Hops were substituted. The plant is reputed to pos- 

 sess tonic, and other medical properties. See tVithering, Scliapf, &c. 



229. PYCNANTHEMUM. Nutt. Gen. 509. 

 [Gr. Pijknos:, dense, and Antkemon, a flower; the flor/ers being collected in dense heads] 



Heads with many-leaved, bract-like involucres. Cor. upper lip subentire, lower trifid. Stam. distant. 

 § 1. Stamens exserted. 

 P. LiNiFOLiUM. Natt. Glabrous; branches fastigiate; leaves linear, acute; bractes subulate-aristate 

 Gynon. Thymus virginicus. IVilld. Brachystemum virginicum. Mx. fw/g-o— Virginian Thyme. 

 Fl. Latter end of July. Fr. mat. Middle of September. 



Ilab. Sterile banks: exsicated swamps: Barrens, &c. frequent. 1 to 2 feet high: flowers white. 



Obs. A pleasant, aromatic herb; and reputed medicinal, ii^fevers, &c. by someof our dealers insirnpks 



P. LANCEOLATUM.P/j. Stem hairy-pubescent; branches erect; leaves lance-linear; calyx-teeth villous. 



>Synon. P. virginicum. A\tt. Ell. Brachystcmon lanceolatus. JMuhl. 



Fl. Latter end of August. Fr. vmt. Beginning of October. 



Hab. Moist, low grounds: Patton's: not common. 12 to 18 inches high: flowers white. 



Obs. This bears considerable resemblance to the foregoing, and was confounded with it by Michaux, &c- 

 but it 13 readily distinguished on comparing them. It is much less common here, than the other speciej. 



§ 2. Stamens included. 



p. MtJTiCL'M. Ell. Leaves lance-ovate, sparingly toothed; bractes lanceolate, acute; calyx teeth ciliate 



Synon. Brachystemum inuticum. Mx. Fu/go— Mountain Mint. 



Fl. Latter end of July. Fr- mat. 



/lab. Dry banks; borders of woods: Wm. Brinton's: rare. About 2fecthigh: flowers pale reddish white. 



Oi?. This plant is pretty well figured in Michaux's Flora Boreali- Americana {tab. 32.). It has a £r.9 



arcniatje odyr, und vrarm taste, 



