PR^FOLIATION 



1. That each leaf-blade is rolled up, beginning at one 



margin. 



2. Cut across the middle of a bud, examine the cut surface 



with a lens and make a sketch, showing 



3. The relative arrangement of the folded leaf-blades and 



4. The method of folding in each case. 



5. The prsefoliation of the leaves just studied is said to be 



convolute. (This is also well shown by the opening 

 leaves of the Calla.) 



VII. Examine the opening leaves of the Violet and 

 notice : 



1. That each margin of the leaf is rolled inward until the 



two rolls thus formed meet at the central line. 



2. Cut a leaf across the middle, examine the cut surface 



with the lens, and make a sketch. 



3. This is called involute prcefolia tion. 



VIII. Examine the opening leaves of an Azalea or of 

 a Dock (the species with large leaves are the best) and 

 notice : 



1. That each margin of the leaf is rolled backward until the 



two rolls thus formed meet in the middle line. 



2. Cut across the middle of a leaf, examine the cut surface 



with a lens, and make a sketch. 



3. This is called revolute prafoliation. 



IX. Examine the opening leaf of a Fern and notice : 



1. That the apex of the leaf is curved downwards and in- 



wards and that a scroll is thus formed, looking like a 

 crozier. 



2. Make a sketch from the side. 



3. This is called circinate prafolia tion. 



