CHAPTER XVIII. 



THE STUDY OF LEAVES. 



FOR this study specimen leaves of different types should 



be provided. 

 It may be assumed that in general the functions of the 



leaf are understood (see p. 208). To aid in interpretation 

 of the structure of the leaf the facts 

 should be revised. 



Pupils should be supplied with a 

 few typical leaves for drawing, e.g. 

 a blade of grass, plantain, daisy, 

 clover, laurel, sycamore, lime, horse 

 chestnut, etc. At this stage the 

 names of the parts should be learned. 

 The most general character observ- 

 able in them all will be readily 

 noted, viz. the flat blade (lamina). 

 Other features common to all are the 

 veins, and of course the colour. 



Differences may now be looked 

 for. The following may readily be 

 educed : 



LEAF-BASE 



LAMINA 



PETIOLE- - 



Fig. 82.. 



A Typical 



,1 Simple 



1. Outline of blade. Differences 

 here are very noticeable, and a lesson 

 or lessons may well be given on the 

 shapes of leaf blade alone. Special cases to note are 

 blades with pointed tips and those of leaves from the 

 same plant this difference to be interpreted with reference 

 to position on stem. 



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