DIANDRIA. MONOGYNIA. 15 



celled, many-seeded; receptacle of the seed, cen- 

 tral, unconnected. 



Habitus. Leaves radical, stellately disposed, thick, 

 soft, and as it were greasy to the loach, composed of an 

 almost diaphanous, distinctly cellular parenchymatoiis 

 substance; scapes 1-flowered; flowevs inverted. Nearly 

 allied to the preceding- genus. 



Species. 1. P. elutior. 2. lutea. 3. pumila. 4 aciiti' 

 folia. 



Obs The American species have the corolla o^cleft, 

 with all the segm^ nts 2-lobed or emarginate; in tiie P. 

 lutea the corolla is campanulate and yellow, with each of 

 the lobes bidentate Of 11 species enumerated in tins 

 genus, ihe United States have 4, Peru 1, and the other 6 

 are confined to -lie aipme and colder morassy regions of 

 Kurope. The Noiih American species grow nearly on a 

 level with the ocean, in moist pine bai'reus. 



Labiate. 



Iff Four naked seeds, 



SI. LYCOPUS. L, (Water-horehound.) 



Calix tubular 5-cleft (or 5-toothed, acute op 

 acuminate). Corolla tubular, 4-lobed, nearly 

 equal; the upper segment broader and emargi- 

 nate. Stamina iMstsint, Seeds 4, retuse. 



Flowers small, axillary, crowded, vertlcillate and ses- 

 sile, generally bibracteate, leaves toothed orsinuated. In 

 the L. Virginicns the calix is 4-cleft and shorter than the 

 seed; and there are the rudiments of 2 abortive stamens 

 in the L. vulgaris. 



Species. 1. L. vulgaris? 2. Virginicus. 3.pumiliis. 4. ob- 

 iusijolius. 5. exaltaUis. 6. angustifolius. 7- sinuatus. .\re 

 not several of these varieties? (With the exception of the 

 L. vulgaris this genus is thus far entirely confined to the 

 United States.) 



22. CUNILA. i. (xMountain Dittany.) 



Crtiioc cylindrical, 10-striate, 5 toothed. Co- 

 rolla ringent, with the upper lip crecr, flat and 

 emarginate. Stamens 2-sterile. The 2 fertile 

 stamens with the style exserted nearly twice 



