236 



Science of Plant Life 



FIG. 145. Freshwater algae. The upright filaments are, from left to right: 

 (Edogonium, producing swimming spores, eggs, and sperms; Microspora, form- 

 ing resting spores and swimming spofes; and Ulothrix, forming swimming 

 spores and gametes. The horizontal filaments are Spirogyra (left) and 

 Vaucheria (right). 



