412 LABIATE. (mint FAMILY.) 



2. C. Nuttallii, Gray. Smaller ; the flowering stems more upright (5 - 9' 

 high), ivith 'narrower mostly entire leaves and fewer-Jlowered clusters, while sterile 

 runners from the base bear ovate thickish leaves only 2-5" long. (C. glabella, 

 var. Nuttallii, Gray.) — Niagara Falls to Minn., south to Mo. and Tex. 



§ 2. Floicers in sessile dense many-flowered clusters, and involucrate with con- 

 spicuous setaceous-subulate rigid bracts ; calyx nearly naked in the throat. 



3. C. Clinop6d.ium, Benth. (Basil.) Hairy, erect (1 - 2° high) ; leaves 

 ovate, petioled, nearly entire ; flowers (pale purple) in globular clusters ; hairy 

 bracts as long as the calyx. — Borders of thickets and fields, naturalized exten- 

 sively, but indigenous from the Great Lakes to the Rocky Mts. (Eu., Asia.) 



16. MELISSA, L. Balm. 



Calyx with the upper lip flattened and 3-toothed, the lower 2-cleft. Corolla 

 with a recurved-ascending tube. Stamens 4, curved and conniving under the 

 upper lip. Otherwise nearly as Calamintha. — Clusters few-flowered, loose, 

 one-sided, with few and mostly ovate bracts resembling the leaves. (Name 

 from fxiKiaaa, a bee ; the flowers yielding abundance of honey.) 



M. officinXlis, L. (Common Balm.) Upright, branching, perennial, 

 pubescent ; leaves broadly ovate, crenate-toothed, lemon-scented ; corolla 

 nearly white. — Sparingly escaped from gardens. (Nat. from Eu.) 



17. HEDEOMA, Pers. Mock Pennyroyal. 



Calyx ovoid or tubular, gibbous on the lower side near the base, 1.3-nerved, 

 bearded in the throat, 2-lipped ; upper lip 3-toothed, the lower 2-cleft. Co- 

 rolla 2-lipped ; upper lip erect, flat, notched at the apex, the lower spreading, 

 3-cleft. Fertile stamens 2 ; the upper pair reduced to sterile filaments or 

 wanting. — Low, odorous annuals, with small leaves, and loose axillary clus- 

 ters of flowers (in summer), often forming terminal leafy racemes. (Altered 

 from 7]5v6(rfjLoy, an ancient name of Mint, from its sweet scent.) 



* Sterile filaments manifest; leaves oblong-ovdte, petioled, somewhat serrate. 



1. H. pulegioides, Pers. (American Pennyroyal.) Erect, branch- 

 ing, hairy ; whorls few-flowered ; upper calyx-teeth triangular, the loAver 

 setaceous-subulate ; corolla (bluish, pubescent) scarcely exserted (2 - 3" long) ; 

 taste and odor nearly of the true Pennijroijal (Mentha Pulegium) of Europe.— 

 Common from N. Eng. to the Dakotas, and southward. 



* * Sterile filaments minute or obsolete ; leaves narrow, entire, sessile or nearly so. 



2. H. hispida, Pursh. Mostly low; leaves linear, crowded, almost gla- 

 brous, somewhat hispid-ciliate ; bracts spreading or refiexed ; upper flowers 

 rather crowded ; calyx-teeth all subulate, equalling the bluish corolla. — Plains, 

 Minn, and Dak. to ^Y. Til. and La. 



3. H, Drummondi, Benth. Pubescent or pnberuUnf, a span or two 

 high; leaves oblong to linear ; bracts mostly erect; calyx hirsute or hispid, its 

 teeth at length connivent, the lower nearly tivice as long as the upper. — Cen- 

 tral Neb. and Kan. to Tex., and westward. 



18. SALVIA, L. Sage. 



Calyx 2-lipped ; upper lip 3-toothed or entire, the lower 2-cleft. Corolla 

 deeply 2-lipped, ringent ; upper lip straight or scythe-shaped, entire or barely 



