LABIATE. (mint FAMILY.) 407 



1. C. Canadensis, L. (Rich-weed. Stone-root.) Nearly smooth 

 (1-3° high); leaves serrate, poiuted, petioled (3-6' loug) ; panicle loose; 

 corolla 8-9" long, lemon-scented; stamens 2. — Kich moist woods, N. Bruns- 

 wick to Wise, south to Fla. and Mo. July - Sept. 



6. PERILLA, L. 



Calyx as in Collinsonia. Corolla-tube included, the limb 5-cleft; lower lobe 

 a little larger. Stamens 4, included, erect, distant. — Coarse aromatic annual, 

 with small flowers in panicled and axillary racemes. (A Greek and Latin 

 proper name.) 



P. ocYMOiDES, L. Erect, branching, 2-3° high; leaves ovate, coarsely 

 tootiied ; flowers white. — About dwellings and roadsides, S. 111. (Schneck.) 

 (Adv. from E. Asia.) 



7. MENTHA, Tourn. Mint. 



Calyx bell-shaped or tubular, 5-toothed, equal or nearly so. Corolla with a 

 short included tube ; the bell-shaped border somewhat equally 4-cleft ; the upper 

 lobe broadest, entire or notched. Stamens 4, equal, erect, distant. — r)dorous 

 perennial herbs ; the small flowers mostly in close clusters, forming axillary 

 capitate whorls, sometimes approximated in interrupted spikes, produced in 

 summer, of two sorts as to the fertility of the stamens in must species. Corolla 

 pale purple or whitish. Species mostly adventive or naturalized from Europe, 

 with many hybrids. {Miwdr] of Theophrastus, from a Nymph of that name, 

 fabled to have been changed into Mint by Proserpine.) 



* Spikes narrow and leajless, densely croicded ; leaves sessile or nearly so. 



M. SYLVESTRis, L. (HoRSE MiXT of Eu.) Finel ij pubesceut Or canesceiH ; 

 leaves ovate-oblong to ohlong-lanceolate , acute, sharply serrate, often glabrous 

 above; spikes rather slender, ca«esc'e«</// pubescent. — Roadsides, etc., Penn. — 

 Var. ALOPECUROiDEs, Baker. Leaves larger, more nearly sessile, broadly 

 oval and obtuse, often subcordate, coarsely serrate, more veiny, but not rugose ; 

 approaching the next. — Penn. and N. J. 



M. rotuxdif6lia, L. Soft-hairy or downy; leaves broadly elliptical to 

 round-ovate and somewhat heart-shaped, ruc/ose, crenate-toothed ; spikes slen- 

 der, not canescent. — Atlantic States, at a few stations, Maine to Tex. 



M. vfRiDis, L. (Spearmint.) Nearly smooth ; leaves oblong- or ovate-lan- 

 ceolate, unequally serrate ; bracts linear-lanceolate and subulate, conspicuous. 



— Wet places ; in all cultivated districts. 



* * Flowers pedicellate, less crowded, in interrupted leafless spikes, or some in 



the upper axils ; leaves petioled. 



M. PIPERITA, L. (Peppermint.) Glabrous (somewhat hairy in var. subhir 

 st^TA),very pungent-tasted; leaves ovate-oblong to oblong-lanceolate, acute, 

 sharply serrate ; spikes narrow, loose. — Along brooks, escaped everywhere. 



M. aquAtica, L. (Water Mint.) Pubescent or smoothish; leaves ovate 

 or round-ovate ; flowers in a terminal globular or interrupted and oblong head, 

 often with one or more clusters in the axils of the upper leaves ; calyx and 

 usually the pedicels hairy. The common form has the stems hairy doicmvard. 



— Wet places, N. Eng. to Del. ; rare. — Var. CRfsPA^ Beuth., is a glabrous or 

 glabrate form, with lacerate-dentate and crisped leaves. — Ditches, N. J., etc. 



* * * Flowers in globidar whorls or clusters, all in the axils of the leaves, the up- 



permost axils not floicer-bearing ; leaves more or less petioled, toothed. 



M. SATIVA, L. (Whorled MiNT.) Stem hairy dowmcard ; leaves ovate 

 sharply serrate; calyx oblong-cylindrical with very slender teeth. — Waste 

 damp places, Mass. to Penn. ; not common. Passes into the next^ 



