374 CRYPTOGAMIA. 



on the union of the stamens and pistils in one flower. 

 On this subject I have been more diffuse in a paper 

 on Mnium, in Tr. of Linn. Soc. v. 7. 254, to 

 which I beg leave to refer those who are desirous 

 of studying it further. Various and abundant spe- 

 cimens of this tribe of plants, showing the various 

 structure of the fringe, lid and other parts, may be 

 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 vigour by moisture. Their beautiful 

 structure cannot be too much admired. Their spe- 

 cies 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, 

 Dickson, Swartz, Bridel, Weber, Mohr and Turner 

 are great names in this department of Botany, be- 

 sides those of whom we have already spoken. 



3. Hepaticce. Liverworts. Of these the herbage is 

 commonly frondose, the fructification originating 

 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 essen- 

 tially from those of the preceding Order in having 

 nothing like a lid or opcrculum. The corolla, or 



