KINDS AND FORMS OF LEAVES. 



51 



the upper row are called pinnately lohed, cleft, parted, or divided, as the case may 

 be, and those of the lower row pahnately lohed, cleft, &c. The number of the lobes 

 or pieces may also be expressed in the same phrase. Thus, Hepatica has a pal- 

 mately three-lohed leaf (Fig. 121) ; the Red Maple a palmately five-cleft leaf (Fig. 

 84), and so on. 



141. In this way almost everything about the shape and veining of a leaf may 

 be told in very few words. How useful this is, will be seen when we come to study 

 plants to find out their names by the descriptions. 



142. All these terms apply as well to the lobes or parts of a leaf, when they are 

 themselves toothed, or lobed, or cleft, &c. And they also apply to the parts of the 

 flower, and to any flat body like a leaf. So that the language of Botany, which the 

 student has to learn, does not require so very many technical words as is commonly 

 supposed. 



143. Compound Leaves (121) are those Avhich have the blade cut up into two or 

 more separate smaller blades. The separate blades or pieces of a compound leaf 

 are called Leaflets. The leaflets are generally jom/ec/ with the main footstalk, just 

 as that is jointed 



with the stem, and 

 when the leaf dies 

 the leaflets fall off 

 separately. 



144. There are 

 two kinds of com- 

 jiound leaves, the 

 jmmate and the 

 palmate. 



145. Pinnate 

 leaves have their 

 leaflets arranged 

 along the sides of 

 the main footstalk, 

 as in Fig. 128, 129, 130. 



146. Palmate (also called Digitate^ leaves bear their leaflets all at the very end 

 of the footstalk; as in Fig. 131. 



147. There are several varieties of pinnate leaves. The principal sorts are: — 



Odd-pinnate. 



Pinnate with a leodriV 



Abruptly pinnate. 



ONTAn:0 COLLEGE OF EDUCATION 



