DIDYNAMIA.— GYMNOSPERMIA. 233 



370. MENTHA. Mint. Labiatce. 



1. M. viridis : spikes interrupted ; leaves sessile, lan- 



ceolate, acute, naked ; bracts setaceous, and with 

 the teeth of the calyx somewhat hairy. 

 HAB. Low grounds. Aug. U. Afoot high; leav. 

 smooth; spik. long ; fl. purp. §. 



2. M. canadensis: flowers verticillate ; leaves lance- 



olate, serrate, petiolate, hairy ; stamens as long as 

 the corolla. 



HAB. Sandy soils. Aug.— Sept. 14. A foot high; 

 fl. pale purp. 

 o. M. borealis : ascending, pubescent ; leaves petio- 

 late, oval-lanceolate, acute at each end ; flowers 

 verticillate ; stamens exsert. 



HAB. Low grounds. July— Sept. H • Stem 2 ft. 

 high, hairy backwards. 



371. ISANTHUS. Labiatx. 



S. cceruleus. 



HAB. River shores. July — Aug. © . Viscid-pu- 



bes., 1 ft. high; leav. oval-Ian. , acute, 3-nerved : 



fl. axill., pedunc, blue. 



372. HYSSOPUS. Hyssup. Labiata. 



H. nepetoides: spikes verticillate, cylindric ; leaves 

 subcordate, ovate, acuminate, dentate. 



HAB. Woods. July. U . Stem 4—6 ft. high, 

 pubes. ; fl. yell.-wh., or pale purp. 



373. NEPETA. Catnep. Labiatce. 



N. Cataria: flowers spiked ; whorls slightly pedun- 

 culate ; leaves petiolate, cordate, dentate, serrate. 



HAB. Fields, &c. June— Sept. i|. . Stem 2—3 

 ft. high ; fl. ?vh. punc. §. 



374. LAMIUM. Dead-nettle. Labiata, 



L. umplexicaule : floral leaves broadly cordate, ses- 

 sile, amplexicaul, crenate, or ia«ised ; lower onc- 

 petiolate- 



U 2 



