THE FLOWEEING PLANT — BUDS 361 



remain after the bud has expanded ? What 

 functions do the bud-scales perform ? 

 Draw several of the bud-scales. 



2. The young leaves. — In what position do you 



find them? How many are there? Is there 

 any correspondence between the position of 

 the leaves in the bud and that of the leaf- 

 scars ? Spread out one of the leaves. Does it 

 resemble in any way the fully developed leaf ? 

 In what manner is the leaf folded in the bud, 

 or, in other words, what form of vernation 

 does it illustrate ? Compare with the fern frond. 

 Note the down covering the leaves. Of what 

 use is it ? At what time of year are the leaves 

 formed ? As the bud expands notice the man- 

 ner and order in which the leaves appear. If 

 the buds be examined before the leaves unfold, 

 their expansion may be hastened by keeping 

 the stems bearing the buds in a warm place 

 and with their cut ends in water. 



3. The axis. — Cut a bud in two lengthwise, and 



notice that the axis of the bud is the continua^ 



tion of the stem. What structures do you find 



borne upon the axis ? To what extent are these 



structures developed? 



Make a diagram showing the structures borne by the 



axis. 



In what respects does a bud resemble a seed? 



A stem ? In what ways does it differ from a seed ? 



Examine buds from different kinds of trees, 



and compare with the horse r chestnut bud. 



Compare an onion with a bud. 



Make drawings of the buds found on all of the stems 



examined. 



