THE BTKUCTURF- OF THE FLOWEK 



3 



20 or 30 of them in each Buttercup (fig. 1). Collectively 

 they form the pistil. Hence we say that the pistil of the 

 Buttercup is composed of 20 or 30 carpels, just as we 



yPetals 



st=^^^^ 



CGirpjSs 



Fi--. 1. -Section of Flower of 



Buttercup 



Fig. 2.— Enlargpfl 

 .Section of Oarpel 



say that a c/r(.<?.9 is composed of 20 or 80 students. Each 

 carpel is made up of three parts: 



1. Stigma, or the top part, usually rough or sticky: 



in consequence it receives and detains the pollen 

 grains. It often takes the shape of a small knob 

 as in the Primrose, but this is not the case in the 



Buttercup. 



2. Style, or the neck upon which the stigma is carried. 



3. Ovary, or the lower expanded portion. Tliis con- 



tains a cavity in which, in this case, a single ovule 

 is developed. Tlie ovule later develops into the 



seed (fig. 2). 



urpe 



not so easy to perceive in the case of the Foxglove flower. 

 Here the number of carpels forming the pistil is only 

 two, but these two are joined together (fig. 4). Tlie evi- 



dence for the statement that the pistil is made up of two 



carpels is furnished by an examination of the top of the 

 pistil, for there are seen to be two stigmas (fig. 4). 

 Again, if the ovary be cut open, two cavities are ob- 

 served. Strictly speaking, the ovary of the Foxglove is 



