LABIATAE, Vor. III. 
g. Mentha Cardiaca Gerarde. Small-leaved 
Mint. Fig. 3688. 
Mentha Cardiaca Gerarde; Baker, Journ. Bot. 2: 245. 1865. 
Pubescent or glabrate, often much branched, 14°-24° 
high, the upper branches ascending. Leaves lanceolate 
to oblong-lanceolate or ovate-lanceolate, acuminate or 
acute at the apex, the lower 2’-3’ long, the upper much 
smaller, all sharply serrate; flowers whorled in the 
upper axils; calyx-teeth subulate, about one-half as long 
as the tube. 
Wet grounds, mostly lene rivers and streams, Nova 
Scotia to New Jersey, Pennsylvania and District of Colum- 
bia. July—-Sept. 
to. Mentha arvénsis L. Corn Mint. Field 
Mint. Fig. 3689. 
Mentha arvensis L. Sp. Pl. 577. 1753. 
Perennial by suckers, pubescent or glabrate; stems 
erect or ascending, simple or branched, 6’~2° high, slen- 
der. Leaves oblong-lanceolate, oval or ovate, petioled, 
acute at the apex or the lower obtuse, crenate-serrate 
with bluntish teeth, rounded at the base, 1’-24’ long, 
4’-1’ wide, the upper not much smaller than the lower; 
whorls of flowers all axillary, usually about equalling 
the petioles; calyx pubescent, campanulate, its teeth 
triangular, about as long as the width of their base, 
acute or sometimes obtuse, one-third as long as the tube. 
In dry waste places, New Brunswick to northern New 
York, New Jersey, Pennsylvania and Flcrida, Also in 
California and Mexico. Naturalized from Europe. Lamb’s- 
tongue. Wild pennyroydl. July—Sept. 
11. Mentha canadénsis L, American Wild Mint. Fig. 3690. 
Mentha canadensis L. Sp. Pl. 577. 1783. 
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 pubes- 
cent with spreading or scarcely reflexed hairs, or 
glabrate, erect, simple, or branched, usually slen- 
der, 6’-24° high. Leaves oblong or ovate-oblong, 
or oblong-lanceolate, slender-petioled, acute at the 
apex, or the lower obtuse, sharply serrate, nar- 
rowed to a somewhat cuneate acute or obtuse 
base, glabrous or very sparingly pubescent, the 
larger 2’-3’ long, 4-1’ wide; whorls of flowers 
all axillary,.often shorter than the petioles; calyx 
oblong-campanulate, densely or sparingly pubes- 
cent all over, its teeth one-fourth to one-third as 
long as the tube. 
_ In_moist soil, New Brunswick to Manitoba, Brit- 
ish Columbia, Virginia, Nebraska, New Mexico and 
Nevada. Consists of several races, differing in 
pubescence, leaf-form and size, Odor like Penny- 
royal. July—Oct. 
