DIFFERENT FORMS OF LEAVES. 



97 



But when they have five or more leaflets they 

 are commonly called digitate* or fingered (Fig. 77), 



B. Pinnately compound leaves. 

 These are called pinnate, and their 

 leaflets pinnae (Fig. 78). They are 

 impari pinnate, or pari-pinnate (un- 

 equally or equally pinnate) accord- 

 ing as there is, or is not, an odd 

 terminal leaflet (cf. Figs. 51, p. 

 74 ; 173). Sometimes the pinnate 

 division is repeated, and the pinnae 

 are themselves pinnate. The 

 bi-pinnate, or tri-pinnate, according 



Fig. 78. Pin- 

 nate (Pinnately 

 compound). 



leaves are then 



Fig. 79. A amplexicaul, B perfoliate, C connate. 



*From the Latin " digitus," a finger. 



fWhen some of the pinnae are largei than others, and the pinnae 

 are not arranged in order of size the leaf is interruptedly pinnate. 

 Sometimes the terms bijugate, trijugate, etc., are used to denote the 

 number of the pairs of pinnoe. From the Latin " bis," twice ; " tres" 

 three ; and " jugum" a yoke, a pair. 



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