CHAPTER VIII. STRUCTURE OF THE FLOWER. 



63 



Recapitulation. 



Prefoliation 

 and 



Prefloration. 



Individual 

 Leaf. 



Relative 

 Arrangement. 



Calyx or Corolla 



when Parts are 



United. 



1. Inflexed or reclinate. 



2. Conduplicate. 



3. Convolute. 



4. Circinate. 



5. Plicate. 



6. Involute. 



7. Revolute. 



Valvate 

 Series. 



I 



I 18. 



( 20. 



L ". 



r i2- 



I 13. 



14. 



• l k 



I 16. 



I 17- 

 Contorted. 



Plicate. 

 Supervolute. 



Imbricate 

 Series. 



Simply Valvate. 



Induplicate valvate. 



Reduplicate- valvate. 



Involute- valvate. 



Imbricate. 



Quincuncial. 



Vexillary. 



Equitant. 



Half-equitant. 



Triquetrous. 



Practical Exercises. 



Examine the flower-buds of the following plants with reference to the pre- 

 floration of calyx and corolla ; draw a diagram of the arrangement in each case, 

 and apply to each the proper term descriptive of the prefloration : The Apple, 

 the Mustard, the field Clover, the Morning glory, the Butter-cup, the Gera- 

 nium, the Buckthorn, the Grape and the Stramonium. 



CHAPTER VIII.— STRUCTURE OF THE FLOWER. 



When complete, the flower consists of four sets of modified 

 leaves, constituting as many different organs, the outer set or 

 whorl called the calyx, composed of individual pieces called 

 sepals ; the second set called the corolla, made up of individual 

 pieces called petals ; the third set called the androecium, made up 

 of individual pieces called stamens ; and the fourth, or central 

 set, called the gynacium, made up of individual pieces called 

 pistils. All of these are inserted on a shortened axis or stem 

 called the receptacle. Fig. 202 is a diagram of a typical flower. 



