The Ferns and Their Allies 



287 



are much used for decorative purposes at Christmas time 

 and are sold under various names such as " ground pine " 



Fig. 170. Two species of club mosses (iyco^oiwm) . In one species (left) the sporangia 

 are borne in the axils of the upper leaves, in the other (right) they are borne in terminal 

 cones. 



and " running cj^ress." The main stems are prostrate on 

 the soil and may be many feet long. They are anchored at 

 intervals by short roots. Numerous upright branches rise 



