408 LABIATE. (MINT FAMILY.) 



M. ARVENSIS, L. (CORN MINT.) Lower and smaller-leaved than the last; 

 leaves obtusely serrate; calyx bell-shaped, the teeth short and broader. Moist 

 fields, N. Eng., etc. ; rare. 



1. M. Canadensis, L. (WILD MINT.) Leaves varying from ovate- 

 oblong to lanceolate, tapering to both ends ; calyx oblong-bell-shaped, the teeth 

 rather short ; hairs on the stem not conspicuously reflexed. The commoner 

 form is more or less hairy, and has nearly the odor of Pennyroyal. Wet 

 places, through the northern U. States across the continent, and northward. 



Var. glabrata, Benth. Leaves and stems almost glabrous, the former 

 sometimes very short-petioled ; scent sweeter, as of Monarda. Similar range. 



8. LYCOPUS, Tourn. WATER HOREHOUND. 



Calyx bell-shaped, 4 - 5-toothed, naked in the throat. Corolla bell-shaped, 

 scarcely longer than the calyx, nearly equally 4-lobed. Stamens 2, distant ; 

 the upper pair either sterile rudiments or wanting. Nutlets with thickened 

 margins. Perennial low herbs, glabrous or puberulent, resembling Mints, 

 with sharply toothed or pinuatifid leaves, the fioral ones similar and much 

 longer than the dense axillary whorls of small mostly white flowers ; in sum- 

 mer. (Name compounded of \VKOS, a wolf, and irovs,foot, from some fancied 

 likeness in the leaves.) 



* Stoloniferous, the long filiform runners often tuberiferous ; leaves only serrate. 

 t- Calyx-teeth usually 4, barely acutish, shorter than the mature nutlets. 



1. L. Virginicus, L. (BUGLE-WEED.) Stem obtusely 4-angled (6' -2 

 high) ; leaves oblong or ovate-lanceolate, toothed, entire toward the base, acu- 

 minate at both ends, short-petioled ; calyx-teeth ovate. Shady moist places, 

 Lab. to Fla., Mo., and northwestward across the continent. 



*- *- Calyx-teeth usually 5, very acute, longer than the nutlets. 

 *+ Bracts minute ; corolla twice as long as the calyx. 



2. L. sessilifolius, Gray. Stem rather acutely 4-angled ; leaves closely 

 sessile, ovate or lanceolate-oblong (1 -2' long), sparsely sharply serrate; calyx- 

 teeth subulate, rigid. (L. Europfeus, var. sessilifolius, Gray, Man.) Pine 

 barrens of N. J. to Cape Cod, Mass. (Deane). 



3. L. rubellus, Moench. Stem rather obtusely 4-angled ; leaves petioled, 

 ovate-oblong or oblong-lanceolate, sharply serrate in the middle, attenuate-acu- 

 minate at both ends (3' long) ; calyx-teeth triangular-subulate, not rigid-pointed. 

 (L. Europaeus, var. integrifolius, Gray.) Penn. to Minn., and southward. 



M- +) Outer bracts conspicuous ; corolla hardly exceeding the calyx. 



4. L. lucidus, Turcz., var. Americanus, Gray. Stem strict, stout, 

 2-3 high; leaves lanceolate and oblong-lanceolate (2 -4' long), acute or acu- 

 minate, very sharply and coarsely serrate, sessile or nearly so ; calyx-teeth 

 attenuate-subulate. Sask. and Minn, to Kan., thence west to Calif. 



* * Not stoloniferous ; leaves incised or pinnatijid. 



5. L. Sinuatus, Ell. Stem erect, 1-3 high, acutely 4-angled ; leaves 

 oblong or lanceolate (l-J-2' long), acuminate, irregularly incised or laciniate- 

 pinnatifid, or some of the upper merely sinuate, tapering to a slender petiole : 

 calyx-teeth short-cuspidate ; sterile filaments slender, conspicuous, with glob- 

 ular or spatulate tips. (L. Enropseus, var. sinuatus, Gray.) Common. 



