Aquarium Plants 



9i 



tinguishable with the naked eye. It differs 

 from the moss-fern in that it does not ex- 

 pand into leaf shape. With its bright 



Fig. 41. Floating Riccia, Riccia fiuitans. 



green threadlike branches it forms more or 

 less dense masses which are ornamental and 

 interesting. Under favorable conditions 



