34 



The Neiv York State College of Forestry 



Inflorescences — Continued 



Indeterminate inflorescences — Continued 

 Simple clusters — Continued 



(c) 



Raceme. Flowers all on pedicels which 

 are shorter than the main axis. (Fig. 

 42.) 



(d) Umbel. Flowers all on nearly equal pedi- 



cels which spring from a common point 

 like the ribs of an umbrella. (Fig. 44.) 



(e) Head. Flowers all sessile or nearly sessile 



and aggregated into a dense cluster on a 

 receptacle or short axis. (Fig. 41.) 

 Compound Clusters. Secondary axis bearing sev- 

 eral flowers arranged according to a 

 definite plan. 



(a) Compound spike. Twice spikately com- 

 pound. 



[h) Compound raceme. Twice racemosely 

 compound. 



(c) Compound umbel. Twice umbellately com- 

 pound. 

 Irregular clusters. 



(a) Panicle. A racemose flower cluster in which 



some of the secondary clusters bear sev- 

 eral irregularly disposed pedicelled flow- 

 ers. (Fig. 45.) 



(b) Corymb. A flat-topped flower cluster of 



the racemose type, with pedicels arising 

 at different points along the main axis. 

 (Fig. 46.) 



Types of Inflorescence 



