16 DIANDRIA. MONOGYNIA. 



the length of the corolla. Stigma unequall)» 

 bifid. Seeds 4. 



Flowers sometimes axillary, mostly in terminal dicho- 

 lomous corymbs. Leaves opposite, punctate. Bractes in- 

 conspicuous. 



Species. 1. C. marimia. An American genus; growing 

 chiefly in rocky, and, to the south, in mountainous situa- 

 tions. The second species of this p^enus, the C capitataoi 

 Vahl, more probably belong-s to ZizipJiora. The common 

 generic remark, of the calix being- villous at the faux, is 

 scarcely ^vorth repeating-, so many different genera hav- 

 ing- the same character; for example, the /fef/eoma, Ziii- 

 phora, Thymus^ and Calamintha. 



23. HEDE(3MA. Persoon. (Wild Pennyroyal.) 

 CalLv bilabiate, gibbous at the base, uppep 

 lip 3-toothed, lower 2; dentures all subulate. 

 Corolla ringent. Stamina 2-sterile. The 2 fer- 

 tile stamens about the length of the corolla. 



Small herbaceous plants possessing the scent of the 

 Jifentha Pulegium. Leaves opposite; flowers verticillate, 

 bracteate; calix internally ciliate-vilious at the base of 

 the cal}cine indentions. (An American genus, with the 

 exception of the H. tJnnnoides of ,Montpelier.)f 



f Species- 1. H. glabra. Perennial, smooth; stem surculose; 

 radical leaves nea.-ly oval, stem leaves oblong-linear, obtuse, alj 

 entire and without veins; flowers upon longish peduncles, bi- 

 bracteate at the base, towards the upper part of the stem most- 

 ly verticillate in 3s. 



Obs. Stem six inches to a foot high, acutely angular, branch- 

 ing from below; leaves nearly obtuse, conspicuously beset with 

 diaphanous glands, entirely smooth, without veins, and closely 

 sessile. Flowers rather large, violet purple, somewhat campa- 

 nulate and ringent; infertile stamens very short; calyx subcy- 

 lindric oblong, internally ciliate at the faux. 



Hab. Principally upon the banks of the St. Lawrence and 

 the upper lakes; at the falls of Niagara: on the Ohio and ia 

 Tennessee; — always on calcareous rocks. 



2. Pulegioides. Pubescent; leaves oblong-lanceolate, ser- 

 rate, veined; verticilli many-flowered; flowers smaller than the 

 calix. From Canada to Carolma. O 



3. * hirta. Dwarf, and branching near the base, pubescent; 

 leaves linear sub-lanceolate, acutisli at both extremities, entire^ 



