CHYPTOGAMIA. 



97 



252. Lycopodiums or club-mosses, better known as 

 ground-pines (Fig. 136), seem to be a connecting link be- 



? 



Pio. 134. 



Pio. 135. 



tween mosses and ferns. They have imbricated leaves grow- 

 ing close down upon the stem, like the arbor- vitae. Their 

 erect branching stems are surmounted by a terminal cone- 

 like spike, containing its sporules at the base of these 

 scales. These sporules are seen in the form of yellow dust, 

 very much resembling the pollen-grain of the pine. There 

 are a few species without stems, having awl-shaped leaves. 

 The resurrection rose is a lycopodium. 



253. Algae are water-plants, found either in salt or fresh 

 water. They are cellular, some having the distinction of 

 fronds and stems. Some have merely stems, simple or 

 branching. The sporules are imbedded in the substance 

 of the frond, or in the tubercles, variously situated. They 

 are generally entirely submerged. The salt-water algae 



252. What of lycopodiums ? 



253. What can you say of the algie plants ? 

 of reproduction. 



Describe their growth and organs 



