GENERAL MORPHOLOGY. 



65 



forming the office of both. Under the head of Thallophytes 

 we comprise those simpler forms of plants which are commonly 

 known as Alga?, Fungi, and Lichens. 



By various intermediate stages through an order of plants 

 called the Liverworts {Jigs. 808 and 810), we an*ive at a series of 

 plants, viz. the true Mosses {figs. 154 and 155), which present us 



Fig. 154. Fig. 156. Fig. 157. 



Fig. li 



Fig. L54. 

 Ilair-moss iPolijtrichum'), 

 with its leaves, stalk, 

 and fructification. 



Fig. \-.5. 

 The male plant, as it is 

 commonly termefi,of the 

 Hair-moss, with its axis 

 and leaves, and termi- 

 nated by tiie supposed 

 male organs (anthe- 

 ridia). 



Fig. L56. 

 The common Club-moss 

 (^Lycopodium clavatum). 



Fig. L57. 



Fructitication of the 



Great Water Horse-tail 



{Equisetum Tclmatcia). 



with an evident stem, bearing leaves. Li these also we find tlie 

 first trace of roots, in the form of little tubular prolongatiouh 

 composed of cells proceeding from the lower part of the stem. 

 In the Mosses, therefore, we have first distinctlv shadowed fortli 



