350 LABIATE. (MINT FAMILY.) 



13. 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 

 fxrj\i(T(ra, a bee; the flowers yielding abundance of honey.) 



1. M. officinalis, L. (Common Balm.) Upright, branching; leaves 

 broadly ovate, crenate-toothed, lemon-scented ; corolla nearly white. — Sparingly 

 escaped from gardens. (Nat. from Eu.) 



14. HEDEOMA, Pers. Mock Pennyroyal. 



Calyx ovoid or tubular, gibbous on the lower side near the base, 13-nerved, 

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

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

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

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

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

 'Hdvocrfiov, an ancient name of Mint, from its sweet scent.) 



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

 ing, hairy ; leaves petioled, oblong-ovate, obscurely serrate, the floral similar ; whorls 

 few-flowered; corolla (bluish, pubescent) scarcely exceeding the calyx ; sterile 

 filaments tipped with a little head. — Open barren woods and fields. — The taste 

 and odor nearly of the true Pennyroyal (Mentha Pulegium) of Europe. 



2. H. hispida, Pursh. Erect, hairy (2' -5? high); leaves sessile, linear, 

 entire, the floral similar and exceeding the flowers ; corolla scarcely longer than 

 the ciliate hispid calyx. — Dry hills, W. Illinois and westward. 



15. COLLINSONIA, L. Horse-Balm. 



Calyx ovate, enlarged and declined in fruit, 2-lipped ; upper lip truncate and 

 flattened, 3-toothed, the lower 2-cleft. Corolla elongated, expanded at the throat, 

 somewhat 2-lipped ; the 4 upper lobes nearly equal, but the lower much larger and 

 longer, pendent, toothed or lacerate-fringed. Stamens 2 (sometimes 4, the up- 

 per pair shorter), much exserted, diverging : anther-cells divergent. — Strong- 

 scented perennials, with large ovate leaves, and yellowish flowers on slender pedi- 

 cels, in loose and panicled terminal racemes. (Named in honor of Peter Collin- 

 son, a well-known patron of science and correspondent of Einnceus, who intro- 

 duced it into England.) 



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

 (l°-3° high); leaves serrate, pointed, petioled (3'-6'long); panicle loose; 

 stamens 2. — Rich moist woods : common. July - Sept. — Corolla 8" - 9" long, 

 lemon-scented. 



16. SALVIA, L. Sage. 



Calyx naked in the throat, 2-lipped ; the upper lip 3-toothed or entire, the 

 lower 2-cleft. Corolla deeply 2-lipped, ringent ; the upper lip straight or scythe- 

 shaped, entire or barely notched ; the lower spreading or pendent, 3-lobed, the 



