THE BUD. 89 



The unisexual flower is one which has but one essential organ. 



The neutral flower is one without any essential organ 



Bracts are said to be scattered when they are singly disposed. 



Bracts are said to be verticillate when they are disposed in whorls. 



The term inflorescence denotes the arrangement of the flowers upon the 

 floral axis. 



The indefinite inflorescence is one in which the lowermost flower expands 

 first. 



The definite inflorescence is one in which the terminal flower expands 

 first. 



The indefinite inflorescence is said to be ascending when the flowers are 

 developed on an elongated floral axis. 



The indefinite inflorescence is said to be centripetal when the flowers 

 are developed on the top of a shortened floral axis. 



The raceme is an ascending inflorescence with pedicellate flowers. 



The spike is an ascending inflorescence with sessile or very short 

 pedicellate flowers. 



The umbel is a centripetal inflorescence with pedicellate flowers. 



The capitulum is a centripetal inflorescence with sessile flowers. 



The solitary inflorescence is a definite one with but one terminal flower. 



The pleiochasial cyme is a general name applied to a definite inflores- 

 cence in which the terminal flower expands first. 



The false raceme is a definite inflorescence arranged like a. raceme in 

 which the true terminal flower is disposed lowermost. 



Spores are minute globular bodies somewhat corresponding to seeds. 



The spore-bearing leaf with one function is that which is only related to 

 the formation of spores. 



The spore-bearing leaf with two functions is that which performs' the 

 action of a foUage leaf besides the formation of spores. 



CHAPTER IV. 



THE BUD. 



In the youngest portion of a stem, the internodes are not 

 ■elongated and the leaves are folded together so as to cover 

 the stem ; such a group, that is, the youngest portion 

 covered with rudimentary leaves, is called a JBud. 



