LABIATAE. 



VOL. III. 



3. Mentha citrata Ehrh. Bergamot Mint. 

 Fig. 3682. 



Mentha citrata Ehrh. Beitr. 7: 150. 1792. 



Perennial by leafy stolons, glabrous throughout; 

 stem weak, branched, decumbent or ascending, l-2 

 long. Leaves petioled, thin, ovate or ovate-orbicular, 

 obtuse or the upper acute at the apex, rounded or 

 subcordate at the base, sharply serrate with low 

 teeth, the larger about 2' long, I'-iY wide; whorls 

 of flowers in terminal dense thick obtuse spikes, and 

 commonly also in the uppermost axils ; spikes scarcely 

 more than i' long in fruit; calyx glabrous, its teeth 

 subulate, one-half as long as the tube, or longer; 

 corolla glabrous. 



In wet soil, Connecticut to New York, Ohio, Michigan 

 and Missouri. Naturalized from Europe. Also in Ber- 

 muda and Porto Rico. July-Sept. 



4. Mentha longifolia (L.) Huds. Horse 

 Mint. Fig. 3683. 



Mentha spicata var. longifolia L. Sp. PI. 576. 1753. 

 Mentha longifolia Huds. Fl. Angl. 221. 1762. 

 Mentha sylvestris L. Sp. PI. Ed. 2, 804. 1763. 



Perennial by suckers, canescent or puberulent 

 nearly all over ; stems mostly erect, branched, or 

 simple, \-2\ high. Leaves lanceolate, ovate- 

 lanceolate, or oblong-lanceolate, sessile, or very 

 short-petioled, acute at the apex, usually rounded 

 at the base, sharply serrate, i '-3' long, \'-\y wide, 

 sometimes glabrous above ; whorls of flowers in 

 terminal narrow dense or interrupted acute spikes, 

 which become 2'-$' long in fruit; bracts lanceo- 

 late-subulate, the lower equalling or longer than 

 the flowers ; calyx tomentose or canescent, its 

 teeth subulate, one-half as long as the campanu- 

 late tube; corolla puberulent. 



In waste places, Connecticut to Delaware, New Jer- 

 sey and Ohio. Naturalized from Europe. Brook- or 

 fish-mint. Water or European horse-mint. July-Oct. 



5. Mentha rotundifolia (L.) Huds. 

 Round-leaved Mint. Fig. 3684. . 



Mentha spicata var. rotundifolia L. Sp. PI. 576. 



1753- 

 Mentha rotundifolia Huds. Fl. Angl. 221. 1762. 



Perennial by leafy stolons, canescent or 

 tomentose-puberulent, somewhat viscid ; stems 

 ascending or erect, simple or branched, usu- 

 ally slender, ii-2i high. Leaves elliptic, or 

 ovate-oblong, short-petioled, or sessile and 

 somewhat clasping by the subcordate or 

 rounded base, obtuse at the apex, crenate- 

 serrate with low teeth, i'-2' long, g"-is" 

 wide, more or less rugose-reticulated be- 

 neath; whorls of flowers in terminal dense 

 or interrupted spikes which elongate to 2'-^' 

 in fruit; bracts lanceolate, acuminate, com- 

 monly shorter than the flowers; calyx-teeth 

 setaceous, usually about one-half as long as 

 the tube; corolla puberulent. 



In waste places, Maine to Florida, Ohio, Ar- 

 kansas, Texas and Mexico. Bermuda. Pata- 

 gonia- or apple-mint. Horse-mint. Wild mint. 

 Naturalized from Europe. July-Sept. 



