182 COMPENDIUM OF GENERAL BOTANY. 



lowing types of inflorescence, of whicli there may occur interme- 

 diate forms, usually classed with one or the other type. 



(a) Racemose Inflorescence. 



Primary and secondary axes exist. Primary axis does not 

 terminate in a flower, secondary axes not branched, usually many, 

 terminating in flowers. 



1. Raceme. Primary axis long, secondary axes short. 



2. Spike. Primary axis long. Secondary axes wanting or very 

 short. 



Subfornis : spadix, primary axis fleshy ; catkin, primary axis 

 often pendulous and falling off after blossoming ; cone, seminifer- 

 ous scales woody. 



3. Umbel. Primary axis short or compressed, secondary axes 

 comparatively long. 



4. Head. Primary axis short and cone-shaped or flattened, 

 secondary axes wanting. 



The following are tlie plants representing the types mentioned : 

 1, C/'uciferm ; 2; Plantago (for the subforms : Aroidew, Salix, 

 Pinus) ; 3, Umhelliferoe ; 4, Compositce. 



(Ji) Paniculose Inflorescence. 



Axes all terminate in flowers and branch repeatedly; secondary 

 axes of the flrst order predominate, decreasing in length and in the 

 frequency of branching with the increase of the orders. 



Panicle, as exemplified in Alisma Plantago. 



JJmhels with terminal flowers are at the same time paniculose 

 and racemose. 



(c) Cicinnose Inflorescence. 



Repeated branching, each axis bearing only one lateral branch, 

 •which extends above the mother-branch. 



To this inflorescence belong the scorpioid and helicoid cymes as 

 -well as the diehasiiim. In the two former the secondary axes are 

 more or less at right angles to the primary axis, in the latter more 

 or less parallel to the primary axis. 



