122 



LABIATAE. 



10. Mentha gentilis I,. 



[Vol,. III. 



(Fig. 3183.) 



Creeping or Downy Whorled Mint. 



Mentha gentilis I,. Sp. PI. 577. 1753. 



Perennial by suckers; stem rather stout, as- 

 cending or erect, branched, puberulent with 

 short reflexed hairs, i°-2° high. Leaves ovate 

 or oval, short- petioled, sparingly pubescent with 

 scattered hairs on both surfaces, often blotched, 

 pinnately veined, acute at both ends, sharply 

 serrate, the larger i;^'-2' long, the upper 

 sometimes much smaller than the lower; whorls 

 of flowers all axillary; pedicels glabrous; calyx 

 campanulate, glabrous below, its teeth subulate, 

 ciliate, one-half as long as the tube; corolla 

 glabrous. 



In waste places and along streams. Maine to 

 nortliern New York, New Jersey and Pennsylvania. 

 Naturalized from Europe. Aug. -Oct. 



II. Mentha sativa L. Marsh Whorled 

 Mint. (Fig. 3184.) 



Mentha saliva L. Sp. PI. Ed. 2, S05. 1763. 



Perennial by suckers; stem ascending, usu- 

 ally widely branched, densely pubescent with 

 sometimes reflexed hairs, i°-3° long. Leaves 

 ovate, short-petioled, pubescent on both sides, 

 acute at the apex, mostly rounded at the base, 

 sharply serrate, the larger i'-2' long, the upper 

 sometimes much smaller; whorls of flowers all 

 axillary, commonly surpassing the petioles; 

 calyx campanulate, pubescent all over, its tri- 

 angular-subulate teeth one-half as long as the 

 tube; pedicels pubescent or glabrous. 



In waste places, Nova Scotia to Pennsylvania. 

 Naturalized from Europe. July-Sept. 



12. 



Mentha Canadensis L. American 



Wild Mint. (Fig. 3185.) 



Mentha Canadensis L. Sp. PI. 577. 1753. 

 Mentha borealis Mich.^. FI. Bor. Am. 2: 2. 1803. 

 Mentha Canadensis var. glabrata Benth. in DC. 

 Prodr. 12: 173. 1848. 



Perennial by suckers; stem more or less pu- 

 bescent with spreading or scarcely reflexed 

 hairs, or glabrate, erect, simple, or branched, 

 usually slender, 6'-2^° high. Leaves oblong 

 or ovate-oblong, or oblong-lanceolate, slender- 

 petioled, acute at the apex, or the lower obtuse, 

 sharply serrate, narrowed to a somewhat cuneate 

 acute or obtuse base, glabrous or very sparingly 

 pubescent, the larger 2'-3' long, yi'-i' wide; 

 whorls of flowers all axillary, often shorter than 

 the petioles; calyx oblong-campanulatc, densely 

 or sparingly pubescent all over, its teeth one- 

 fourth to one-third as long as the tube. 



In moist soil, New Brunswick to the Northwest 

 Territorj- and British Columbia, south to Virginia, 

 Nebraska, New Mexico and Nevada. \'ariable. 

 Odor like Pennyroyal. July-Oct. 



