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The New York State College of Forestry 



(d) 



(e) 



Inflorescences ■ — Continued 



Indeterminate inflorescences — Continued 

 Simple clusters — Continued 



(c) Raceme. Flowers all on pedicels which 

 are shorter than the main axis, (Fig. 

 42.) 

 Umbel. Flowers all on nearly equal pedi- 

 cels which spring from a common point 

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

 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. 



(b) 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.: 



3. 



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42 



Types of Inflorescence 



