122 



LABIATAE. 



[Vol. III. 



10. Mentha gentilis L. 



Creeping or Downy Whorled Mint. (Fig. 3183.) 



Mentha gentilis L. 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 l / 2 / -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 

 northern New York, New Jersey and Pennsylvania. 

 Naturalized from Europe. Aug. -Oct. 



11. Mentha sativa L. Marsh Whorled 

 Mint. (Fig. 3184.) 



Mentha sativa L- Sp. PI. Ed. 2, 805. 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- J 753- 

 Mentha borealis Michx. Fl. 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'-$' long, ^ / -i / wide; 

 whorls of flowers all axillary, often shorter than 

 the petioles; calyx oblong-campanulate, 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 

 Territory and British Columbia, south to Virginia, 

 Nebraska, New Mexico and Nevada. Variable. 

 Odor like Pennyroyal. July-Oct. 



