vii.] THE LEAVES. 67 



tifid, the latter of the pinnatifid type. If the segments 

 be separated nearly to the petiole, the leaf is palmati- 

 partitej if nearly to the midrib it is pinnatipartite. The 

 termination -partite being substituted for -fid to denote 

 deep division of the blade. There are many modifications 

 of these principal types of form, distinguished by special 

 terms, but with these it is not needful to burden the 

 memory just at present* 



(x-^/ 



FIG. 46. Pinnate leaf of Rose. A pair of adherent (adnate) stipules 

 are shown at the base ; one on each side. 



10. Compound haves we shall class as we have done 

 the divided simple leaves, from which they differ in 

 having the blade divided into leaflets, which are given ofT 

 from the summit of the petiole, or from the midrib (com- 

 mon petiole), as the case may be. The leaflets separate 

 from the petiole or midrib in the same way that the 

 entire leaf separates from the stem, that is, without tearing. 

 Sometimes it is very difficult to tell, at first sight, whether 

 a leaf should be called simple or compound. Generally, 

 however, it is plain enough. Many beginners fall into the 

 mistake of calling leaflets leaves, but a little care will 

 rarely fail to save any one from such a mistake. Com- 

 pound leaves are either of the pinnate type, as Rose, or of 

 the digitate type, as Horse Chestnut. The Rose leaf is 



* See Dr. Lindley's pamphlet, "Descriptive Botany." 

 Explanations (with figures) are given of all the terms in com- 

 mon use. 



F 2 



