Ch. IX.] LEAVES. 55 



213. Pinnate ; at Fig. 35, a, represents the petiole or prin- 

 cipal leaf stalk; from this, spring out other divisions, each bear- 

 ing a leafet; 6, 6, represent the stipules or appendages; the 

 whole taken together forms one compound pinnate leaf. Tiie 

 term pinnate is from the Latin pinna, a wing or pinion. 



2] 4. Binate; when two leafets only spring from the petiole, 

 as in Fig. 35, c. 



Fig. 36. 



a 



215. Ternate ; when three leafets arise from the petiole, as 

 Fig. 36, a. 



216. Bi-ternate is a second division o5threes, as Fig. 36, b. 



217. Tri-ternate is a third division of threes, as Fig. 36, c. 



Fig. 37 



u 



218. Decompound, is when a pinnate leaf is again divided, 

 or has its leaves twice compound, as Fig. 37, a. At 6, is a re- 

 presentation of thrice compound leaves. 



219. Leaves vary in size, from the small leaves of some of 



213. What does pinnate signify 1 



214. What is binate 1 



215. When is a leaf said to be ternate7 



216. When bi-ternate 7 



217. When tri-ternale 1 



218. When is a leaf said to be decompound ? 



219. What is remarked of leaves with respect to size? 



