ii8 



LABIATAE. 



[Vol. III. 



5. Lycopus lucidus Turcz. 



Western Water Hoarhound. (Fig. 3172.) 



L. lucidu stwrcz.; Bcntli. in DC. Prodr. 12: 178. 1848. 

 Lycopw. lucidus var. Americanus A.. Gray, Proc. Am. 



Acad. 8; 286. 1S70. 



Pubescent or glabrate, perenoial by stolons; stem 

 usually stout, erect, strict, leafy, simple, or some- 

 times branched, i°-3° high. Leaves oblong-lan- 

 ceolate, acute at the apex, narrowed or rounded at 

 the base, sessile, or very short-pctioled, 2'-6' long, 

 li'-i'/z' wide, sharply serrate with acute ascending 

 teeth; bracts ovate or lanceolate, acuminate-subu- 

 late, the outer ones often as long as the flowers; 

 calvx-teeth 5, subulate-lanceolate, nearly as long as 

 the tube; corolla little longer than the calyx; rudi- 

 mentary stamens slender, thickened at the tips; 

 nutlets much shorter than the calyx. 



In wet soil, Minnesota to Kansas, west to British Co- 

 lumbia, California and Arizona. Also in northern Asia. 

 July-Sept. 



6. Lycopus Europaeus L. W^ater or 

 Marsh Hoarhound. Gipsy-wort. 

 Gipsy-herb. (Fig. 3173.) 

 Lycopus Europaeus I,. Sp. PI. 21. 1753. 



Puberulent or pubescent, perennial by suck- 

 ers; stems stout, at length widely branched, 

 \°-2yi° high. Leaves ovate, ovate-oblong, or 

 oblong-lanceolate, short-petioled, or the upper 

 sometimes sessile, coarsel}^ dentate, or the lower 

 incised at the base, i'-3' long, yi'-i' wide; 

 bracts subulate-lanceolate, the outer shorter 

 than or equalling the flowers; calyx-teeth subu- 

 late-spinulosc; corolla scarcely longer than the 

 calyx; rudimentary posterior stamens obsolete; 

 nutlets shorter than the calyx. 



In waste places, southern New York to Virginia. 

 Naturalized from Europe. July-Sept. 



35. MENTHA L. Sp. PI. 576. 1753. 

 Erect or diffuse odorous herbs, with simple sessile or petioled mostly punctate leaves, 

 and small whorled purple pink or white flowers, the whorls axillary or in terminal dense or 

 interrupted spikes. Calyx campanulate to tubular, lo-uerved, regular, or slightly 2-lipped, 

 5-toothcd. Corolla-tube shorter than the calyx, the limb 4-cleft, somewhat irregular, the 

 posterior lobe usually somewhat broader than the others, entire or emargiuate. Stamens 4, 

 equal, erect, included orexserted, sometimes imperfect; filaments glabrous; anthers 2-celled, 

 the sacs parallel. Ovary 4-parted; style 2-cleft at the summit. Nutlets ovoid, smooth. 

 [Name used by Theophrastus; from the nymph Minthe.] 



About 30 species, natives of the north temperate zone. Tlie more or less characteristic odors of the 

 species change during the progress of the life of the plant. The following occur in North America. 



^ Whorls of flowers in terminal spikes, or some in the upper axils. 

 Plants glabrous or very nearly so. 



Spikes slim, narrow, mostly interrupted; leaves sessile, or nearly so. 

 Spikes thick, mostly dense, at first short; leaves petioled. 

 Leaves lanceolate or oblong, acute. 

 Leaves ovate, obtuse, or the upper acute, subcordate. 

 Plants villous, hirsute or canescent, at least at the nodes. 

 Spikes slim or narrow, often interrupted. 



Leaves lanceolate or ovate-lanceolate, acute. 

 Leaves elliptic or ovate-oblong, c)btuse, reticulated beneath. 

 Spikes thick (6" ). dense, elongated or short. 



I. M. spicala. 



M. piperita. 

 M. citrata. 



M. longifolia. 

 M. rolundifolia. 



Leaves sessile; spikes i'-3 long; plant canescent. 

 Leaves distinctly petioled, or the uppermost sessile; spikes short 

 Leaves simply serrate. 



Leaves mostly incised, the margins crisped and wavy. 

 -X- -X- Whorls of ilowers all axillary. 

 Leaves erenate-dentate; calyx teeth triangular, short. 



6. ^f. alopecuroides. 



7. M. aqualica. 



8. M. crispa. 



Q. l\r. arvensis. 



