HIGHER PLANTS 



Fig. 8i. — Water milfoils, Myriophyllum spicatum. 



Bladderworts have slender stems which bear finely branched 

 leaves arranged alternately but divided so close to the base 

 that each leaf appears like two leaves growing opposite to 

 eacn other. On the branches of each leaf are the small 

 bladder-like traps or utricles. There are no true roots but 

 one end of the plant bears green, twig-like rhizoids which 

 perform the work of roots. Air shoots will grow up from the 

 surface when the oxygen supply is low in the water. This 

 bladderwort has yellow flowers on stalks which extend 3 or 

 4 inches above the water. Each bladder is a slightly com- 



lOI 



