LABORATORY PRACTICE 



with a bud (or branch} in its axil. (This definition, 

 while a good working definition, will not apply in a 

 few exceptional cases. But the same thing will be 

 found true of almost any definition of any natural 

 object.) 

 8. Make a sketch to show these points. 



II. Remove one leaf carefully so as to retain all the parts, 

 and notice : 



1. The broad expanded portion, the blade or lamina. 



Notice its outline. 



2. The slender stalk or petiole. 



3. The pair of small expanded structures, the stipules, at the 



base of the petiole. 



4. Make a sketch to show these parts and label carefully. 



5. This leaf is a good type of a simple leaf (i.e. of a leaf with 



a single blade} having all the three parts represented; 

 viz. blade, petiole, and stipules. 



III. Examine the blade of the leaf of the Japanese 

 Quince (or better, that of some thinner leaf such as the 

 Mock Orange or the Pittosporum) and notice the venation 

 or method of arrangement of the veins or ribs. 



1. A prominent midrib. 



2. Side veins or ribs running outward toward the edge and 



obliquely upwards. 



3. These in turn branch, and then these branches branch 



again, and so on, the finer branches anastomosing or 

 joining to form a fine network. Such a leaf as this 

 is said to be netted-veined. 



4. Make a sketch to illustrate this. 



