232 



WEEDS AND USEFUL PLA]SrTS. 



4. HEDEO'MA, Pers. Pennyroyal. 



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



Calyx ovoid-tubular, gibbous on the uDcler 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. Hcrhs with small leaves and 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. Americau-Fennyroyal. 



Root annual. Steyn 6-12 inches liigli, hoary-pubescent, branched. Leaves half an inch 

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

 half an inch in length, — Vm floral leaves resembhng the cauline ones. Cyjnules usually 

 S-flowered ; hradeoles linear-lanceolate, scarcely as long as the pedicels. Corolla pale 

 blue, with purple spots. Stamens scarcely exserted, ascending, the anthers approximated 

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



Slaty soils, old lields, &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. MONAE'DA, L. Horse-mint. 



[Dedicated to Nicholas Monardez, a Spanish Botanist.] 



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

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

 ly 2-lipped limb ; upper Up 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 ; anthers 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 large exterior 

 bracts purplish ; calyx smooth, 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. 



.2?ooi perennial. <Stem. 1-2 feet high, 4-angled, branching, semewhat hairy. Leaves 6- 

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

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

 a half long. 



New England West and South. July -August. 



