LABIATAE. 281 



bank (C), May's Landing (Li.), Egg Harbor (Wn.). Ocean— Forked 

 Kiver (Cr.) (Wn.), Toms River (Ha.) (Ja.). 



4. Lycopus rubellus Moench. M. p. 804. Moist soil. Summer. 



CaTMderi— Winslow (C). 



New Casfie— Blackbird, Covimons; Canal bank, Tatnall and Commons. 



5. Lycopus Americanus Muhl. M. p. 804. Wet soil. Summer. 



6. Lycopus Europaeus L. M. p. 804. Ballast. Summer. 



Camden — Camden (C). Salem— Salem (C). 



* 28. MENTHA L. Mint. 



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

 Plants glabrous or very nearly so. 



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



1. M. spicata. 

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



2. M. piperita. 

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



Spikes slim or narrow, often interrupted. 



Leaves lanceolate or ovate-lanceolate, acute. 



3. M. longifolia. 

 Leaves elliptic or ovate-oblong, obtuse, reticulated beneath. 



4. M. rotundifolia. 

 Spikes 10-12 mm. thick, dense, elongated or short. 



Leaves sessile; spikes 2-8 cm. long; plant canescent. 



5. M. alopecuroides. 

 Leaves distinctly petioled, or the uppermost sessile; spikes 



short. 

 Leaves simply serrate. 6. M. aquatica. 



Leaves mostly incised, the margin crisped and wavy. 



7. M. crispa. 

 Whorls of flowers all axillary. 



Leaves crenate-dentate ; calyx-teeth triangular, short. 



8. M. arvensis. 

 Leaves sharply serrate; calyx-teeth subulate. 



Calyx-teeth ciliate, the tube glabrous; leaves ovate. 



9. M. geniilis. 

 Calyx densely or sparsely pubescent all over. 



Leaves ovate, pubescent on both sides; hairs of the stem re- 

 flexed. 10. M. sativa. 

 Leaves oblong or ovate-oblong, nearly or quite glabrous. 



11. M. Canadensis. 



1. Mentha spicata L. Spearmint. M. p. 805. Wet places. Summer. 



2. Mentha piperita L. Peppermint. M. p. 805. Wet soil. Summer. 



3. Mentha longifolia (L.) Huds. Eorse-mint. M. p. 805. 



Philadelphia — Wissahickon (Je.). BmcA's— (P.). Northampton — 'Eas- 

 ton. Porter (B. C), Pen Argyl (U. C. S.). 



Camden— White Horse (C). iSoiew— Woodstown (C). Cumberland — 

 Vineland (Ab.). MonmoM^/i- Seabright (C). Hunterdon— Bull's Island 

 (C). 



New Castle — Collins' Beach, Commons. 



4. Mentha rotundifolia (L.) Huds. M. p. 805. Waste places. Summer. 



Buds— Center Bridge (Fr.), near New Hope (Ws.). Montgomery — 

 Whitemarsh (Me.). Lehigh — Go-play (Kr.). Northampton — Haston, 

 Porter (B. C). 



