220 FOUNDATIONS OF BOTANY 



Of what use are the sepals, after drying up ? Why do the fruits 

 cUng to the plant long after ripening? 



Carefully remove the sepals and examine the fruit within them. 

 What is its color, size, and shape? Make a sketch of it as seen with 

 the magnifying glass. Note the three tufted stigmas, attached by 

 slender threads to the apex of the fi-uit. What does their tufted 

 shape indicate ? 



What evidence is there that this seed-like fruit is not really a 

 seed? 



Make a cross-section of a fruit and notice whether the wall of 

 the ovary can be seen, distinct from the seed-coats. Compare the 

 dock fruit in this respect with the fruit of the buttercup, shown in 

 Pig. 166. Such a fruit as either of these is called an ahene. 



