186 



AQUATIC PLANTS 



CERATOPHYLLUM 



Hornwort, as it is generally known, is mentioned here on account 

 of its resemblance to Myriophyllum, for which it is sometimes gath- 

 ered. It is an extremely poor aquarium plant, being very brittle and 

 liable to rapid decomposition. Besides its characteristic of being 

 fragile, it may also be recognized by having practically no roots, 

 absorption taking place in the leaves. 



It is found principally in ponds and slow-moving streams, where 

 it washes about freely with the current. 



Fig. 168. Myriophyllum 



1(j9. 



Gre.\ter Bl.\dderwort 

 UTRICULARIA 

 :Many kinds of Utriciilaria, or Bladderwort, are distributed in the 

 Temperate Zone. They have somewhat the appearance of the finely- 

 divided leaves of Myriophyllum, but may be identified by the small 

 bladders dotted throughout. Our figure 169 of U. vulgaris gives a good 



