92 



LEAVES AND FOLIAGE 



127. Pinnately compound leaf of ash. 



general term to express any degree of compounding be- 

 yond twice -compound. 



193. Leaves which are not divided to the midrib are 

 said to be : 



lobed, openings or sinuses 



not more than half the 



depth of the blade 



(Fig. 129). 



cleft, sinuses deeper than 



the middle. 



parted, sinuses two-thirds 

 or more to the midrib 

 (Fig. 130). 



divided, sinuses nearly or quite to the midrib. 

 The parts are called lobes, divisions, or segments, rather 

 than leaflets. The leaf may be pinnately or digitately 

 lobed, parted, cleft, or divided. A pin- 

 nately parted or cleft leaf is sometimes 

 said to be pinnatifid. 



194. Leaves may have one or all of 

 three parts blade or expanded part, pet- 

 iole or stalk, stipules or appendages at 

 the base of the petiole. All these parts 

 are shown in Fig. 131. A leaf which has 

 all three of these 

 parts is said to be 

 complete. The 

 stipules are often 

 green and leaf -like 

 and perform the function of foliage, 

 as in the pea and Japanese quince 

 (the latter common in yards). 



195. Leaves and leaflets which 

 have no stalks are said to be ses- 

 sile (Fig. 137), 1. 6., Sitting. The 129. Lobed leaf of sugar maple. 



128. Digitately com- 

 pound leaf of rasp- 

 berry. 



