36 



PART I. — ORGANOGRAPHY. 



pari-pinnate, or odd-pinnate, in which the leaf terminates with a 

 single leaflet, as in Fig. 117 ; the cirrhosely-pinnate, in which the 

 leaf is terminated by a tendril, as in Fig. 118 ; the interruptedly- 

 pinnate, in which, as in the Silver-weed and Potato, Fig. 119, 

 there are smaller leaflets scattered among larger ones ; the lyrate, 

 leaf, in which the terminal leaflet is largest, and the others suc- 

 cessively smaller toward the base, as in Fig. 120, and the leaves 



Fig. 117. 



Fig. 118. 



Fig. 119. Fig. 



Fig. 121. 



Figs. 116 to 121, inclusive, forms of pinnately-compound leaves ; 116, pari-pinnate : 

 117, impari-pinnt te ; 118, cirrhosely pinnate : 119, interruptedly-pinnate ; 120, lyrate ; and 

 121, bi-pinnate. 



that are more than once compounded on the pinnate plan. Fig. 

 121 shows a leaf which is twice compounded ; it is called a bi- 

 pinnate leaf; one which is three times compounded on the same 

 plan is tri-pinnate ; one that is many times pinnately com- 

 pounded, multi-pinnate, etc., and a leaf which is somewhat 

 irregularly compounded many times on the pinnate plan is termed 

 pinnately -decompound. 



Fig. 122. 



Fig. 123. 



Fig. 124. 



Fig. 125. 



Fig. 126. 



Figs. 122 to 126, inclusive, forms of palmately-compound leaves ; 122, ternate ; 123, 

 quadrate ; 124, quinate ; 125, bi-ternate ; and 126, septenate. 



A similar series of terms apply to leaves compounded on the 

 radiate plan. Such a leaf, compounded on the plan of three is a 

 palmately-trifoliolate or ternate leaf, as the leaf of the Clover, 

 Fig. 122 ; one with four radiating leaflets is palmatcly-quadrifolio- 

 late, or quadrate, as the leaf of Marsilea, Fig. 123 ; a radiate leaf 



