242 General Botany 



these parts. In some flowers the calyx, or the corolla, may have 

 its parts united into a tube, or one or both may be wanting. Or 

 the flowers may lack either pistils or stamens. For example, 

 the red maples and the cottonwood bear pistillate flowers on 

 some trees and staminate flowers on others, and the corn has 

 staminate flowers on the tassel and pistillate flowers on the lateral 

 branches or ears. It is not our purpose to name and describe here 

 the many different variations in floral structure ; a visit to a 

 conservatory or a tramp through the near-by fields and woods is 

 the most effective way of securing an idea of the great diversity 

 of flowers. 



