252 LAMAT.E. 



5. COLLINSONIA, Linn. Horse-Balm. 



In honor of PtUr Collins, of London, a patron of botany. 



Calyx ovate, about 10-nerved, 2-lipped; tipper lip 3- 

 toothed, truncate; lower 2-tootbed. Corolla elongated, 

 expanded at the throat, somewhat 2-lipped, with the 4 upper 

 lobes nearly equal, the lower larger and longer, toothed er 

 lacerate-fringed. Stamens mostly 2, much exserted, di- 

 verging. — Strongly-scented perennials, with large ovate leave*, 

 and yellowish Jlowers on slender pedicels in loose and panicltd 

 terminal racemes. 



C. Canadensis, L. Common Horse-Balm. Stone-root. 



Nearly smooth; leaves broadly ovate, serrate, pointed, petioled ; panicle loose, 

 many-flowered ; stamens 2. 



Rich moist wood?, common. July — Sept. Stan 1 to 3 feet high, somewhat 

 branched, 4-angled. Leaves thin, 6 to S inches long, and 3 to 4 inches wide. Flow • 

 trs largo, greenish-yellow, exhaling the odor of lemons. 



6. HEDEOMA, Persoon. Pennyroyel.' 



A Greek name for Mint, alludiug to its agreeable odor. 



Calyx ovoid-tubular, gibbous on the lower side near the 

 base, 2-lipped \ tipper Up 3-toothed ; lower Up 2-cleft. Co- 

 rolla 2-lippcd; upper lip erect, flat, notched at the apex-; 

 lower spreading, 3-cleft, the lobes nearly equal. Stamens 2, 

 fertile and ascending, 2 lower, sterile filaments or wanting. — 

 Low aromatic plants, with small leaves, and loose axillary clusters 

 of pale blue Jlowers, somewhat approximated in terminal leafy ra* 

 eemes. 



H. rULEGlOlDES, Pers. American Pennyroyel. 



Stem erect, branched, pubescent; leaves ovate or elongated, obscurely serrate, 

 narrowed at the base, petioled; whorls about 6-Qowered; corolla about as long &■ 

 the calyx. 



Open barren woods and dry fields, common. July — Sept. Plant 6 to 10 inches 

 high, branched above. Leaves opposite, with 1 to 2 teeth on each side. Flowers 

 small, pale-blue, about 3 in each opposite axil. A popular domestic medicinal herb. 



-7. CUNILA, Linn. Dittany. 



An ancient Latin name of unknown origin. 



Calyx ovoid-tubular, equally 5-toothed, hairy in the 

 throat, about 13-nerved. Corolla 2-lipped : upper Up 

 erect, flattish, mostly notched j lower lip B-lobed, spreading. 

 Stamens 2, erect, exserted, distant. Style 2-parted at 

 the summit. — Perennial herbs, with small white or ^purplish 

 ■/lowers in corymhed cymes or close clusters. 



