CRYPTOGAMIA. 493 



seen in the latter volumes of English 

 Botany more especially. 



Mosses are found in the hottest and 

 coldest climates. They are extremely 

 tenacious of life, and, after being long 

 dried, easily recover their health and vi- 

 gour by moisture. Their' beautiful struc- 

 ture cannot be too much admired. Their 

 v species are numerous, and in some cases 

 difficult to determine, particularly in the 

 genera Tortula and Orthotrichum; nor is 

 the generic character of the latter so easy 

 or certain as most others. Schreber, Dick- 

 son, Swartz, Bridel, Weber, Mohr and 

 Turner are great names in this department 

 of Botany, besides those of whom we have 

 already spoken. 



S. IlepaticcE. Liverworts. Of these the herbage 

 is commonly frondose, the fructification ori- 

 ginating from what is at the same time both 

 leaf and stem. This character, however, 

 proves less absolute than one founded on 

 their capsules, which differ essentially from 

 those of the preceding Order in having 

 bing like a lid or operculum. The co- 



