PART II. 



ON THE COMPOUND ORGANS OP PLANTS.— THE CRYPTO- 

 GAMIA, OR FLOWERLESS PLANTS. 



CHAPTER I. 



CELLULARES, OB, CELLULAR PLANTS. 



60. The cells have now been separately considered, and the 

 student has been made acquainted with such facts respecting 

 their origin and anatomical peculiarities as are afforded by the 

 present state of science. We are now about to investigate the 

 phenomena of the cells in a state of combination, or when 

 united together into those masses of tissue which constitute 

 definite organs. 



61. In the lower forms of vegetation, such as algse or sea- 

 weed, lichens, and mosses, the cells retain, to a great extent, 

 their primitive form, being but slightly altered by the com- 

 pression and growth of the parts. For this reason, these plants 

 have been called by botanists cellulares or cellular plants. 



62. These cellular plants commence the vegetable series, 

 and are by far the most interesting in the vegetable kingdom. 



