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 

 p.rj\i(rtra, a bee ; the flowers yielding abundance of honey.) 



1. M. OFFICINALIS, L. (COMMON BALM.) Upright, branching; leaves 

 bjoadly 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 

 *H8t;der/Lioi>, an ancient name of Mint, from its sweet scent.) 



1. H. pulegioides, Pers. (AMERICAN PENNYROYAL.) Erect, branch- 

 ing, hairy ; leaves petioled, oblong-ovate, dscurely 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 Linna3us, 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. SAL VI A, 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 



