232 WEEDS AND USEFUL PLANTS. 



4. HEDEO'MA, Pers. PENNYROYAL. 



[Greek, Hedeia Osme, a pleasant odor ; from its fragrance.] 



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

 bilabiate, the upper lip 3-toothed lower one bifid ; throat villous. 

 Corolla bilabiate, the upper lip erect, flat lower lip spreading, 3-lobed, 

 lobes nearly equal. Stamens 2, ascending, the two upper entirely want- 

 ing, or rudimentary and sterile. Herbs with small leaves arid loose ax- 

 illary clusters of flowers, often forming terminal leafy racemes. 

 1. H. PULEGIOI'DES, Pers. Leaves lance-ovate, rather obtuse, subserrate, 

 narrowed at base, petiolate ; cj mules about 3-flowered. 

 PULEGIUM-LIKE HEDEOMA. American-Pennyroyal. 



Rod annual. Stem 6-12 inches high, hoary-pubescent, branched. Leaves half an inch 

 to an inch long, slightly pubescent, narrowed at base to a pubescent petiole one-Qighth to 

 half an inch in length, the floral leaves resembling the cauline ones. Cymules usually 

 3-flowered ; bracteoles linear-lanceolate, scarcely as long as the pedicels. Corolla, pale 

 blue, with purple spots. Stamens scarcely exsertecl, a'scendirig, the anthers approximated 

 under the upper lip, the upper pair of stamens reduced to mere abortive rudiments. 



Slaty soils, old fields, &c. : throughout the United States. Fl. July -August. Fr. 

 September. 



Obs. A. warmly aromatic little herb, in general use as a popular dia- 

 phoretic, carminative, &c., and therefore entitled to a description by 

 which it may be certainly recognized. This is not the " Pennyroyal" of 

 Europe ; but has been so called because of its resemblance to that 

 plant, which is a species of Mint viz., the Mentha Pulegium, L. 



5. MONAR'DA, L. HORSE-MINT. 



[De '.icated to Nicholas Monardez, a Spanish Botanist.] 



Calyx tubular, elongated, 15-nerved, nearly equally 5-toothed ; throat 

 usually hairy. Corolla with a slightly expanded throat, and a strong- 

 ly 2-lipped limb ; upper lip entire, or slightly notched, erect, embracing 

 the filaments ; lower lip spreading, 3-lobed, the middle lobe narrowest 

 and slightly notched. Stamens 2, elongated, ascending, inserted in the 

 throat of the corolla ; ant/ters linear, the divaricate cells confluent at 

 the junction. Flowers large in a few whorled heads closely surrounded 

 with bracts. 



1. M. did'yma, L. Leaves ovate-lanceolate, acuminate, mostly rounded 

 or somewhat heart-shaped at base, the floral ones and Jarge exterior 

 bracts purplish ; calyx s,mooth, incurved, nearly naked in the throat ; 

 corolla smooth, much elongated, bright' red ; stamens exserted beyond 

 the acute upper lip of the corolla. 

 Oswego Tea. Bee Balm. 



Root perennial. Stem 1-2 feet high, 4-angled, branching, somewhat hairy. Leaves 3- 

 5 inches long and 1-2 inches wide, somewhat hairy on both sides, especially on the veins 

 below ; petioles half an inch long. Flotvers in 1-2 (rarely 3) whorls ; corolla an inch and 

 a half long. 



New England , West and South. July - August. 



