66 



LEAVES. 



[SECTION 7 



leaf compound. Here, using the Lat in form, the leaf is said to be bisected, 

 trisected (Fig. 153), etc., accurdiug to the number of the divisions. 



141. The Mode of Lobing or Division corresponds to that of the 

 veining, \\\\iii\\t\: jjinnalelj/ veined or palniatclif veined. In tlie former the 

 notches or incisions, or sinuses, coming Ix'twcen the principal veins or ribs 

 are directed toward the midrib : in tlie latter they are directed toward the 

 apex of the petiole ; as the figures sliow. 



142. So degree and mode of division may be tersely expressed in brief 

 phrases. Thus, in tlie four upper figures of piunately veined leaves, tlie 

 first is said to be pinnatel^ lobed (in the special sense), the second pinnateli/ 

 cleft (or pinnatijid in Latin form), the third pinnatelj parted, the fourtli 

 ^innately divided, or pinnaiisected. 



143. Correspondingly in the lower row, of palmately veined leaves, the 

 first is palmately lobed, the second palmately clfft, the third palmately 

 parted, the fourth palmately divided. Or, in other language of the same 

 meaning (but now less commonly employed), they are said to be digitately 

 lobed, cleft, parted, or divided. 



144. The number of the divisions or lobes may come into the phrase. 

 Thus in the four last named figures the leaves are respectively palmately 



three-lobed, three-cleft (or trifd), three-parted, three -divided, or better (in 

 Latin form), trisected. And so for higher numbers, -a^ fve-lobed, fve-cleft. 



Fig. 148, pinnately lohed; 149, pinnately cleft; 150, piunately parted ; 151, 

 pinnately divided, leaves. 



Fig. 152, palmately three lobed ; 153, j)almately three-cleft; 154, [lalmately 

 three-parted ; 155, palmately three-divided or trisected, leaves. 



