The Flower 



137 



The first large class of inflorescences contains all 

 those in which the main stem, giving off flowers from its 

 sides, goes on growing all the time so that its growth 

 is indefinite, i.e. unlimited in length. The oldest flowers 



Fig. 67. (1) Male and (2) female Willow catkins. 



will thus be those at the base of the inflorescence, and 

 the young ones further up, with the smallest buds at the 

 very top. These indefinite inflorescences depend for 

 their shape on the length and arrangement of the small 



