54 



OF LEAVES. 



rest. The pitcher-plant is a native of Ceylon, where it is called 

 monkey-cup, on account of its being frequented by these animals for 

 th(; purpose of quenching their thirst. 



Compound Leaves. — When sp"eral leafets grow on one petiole, the 

 whole is termed a compound leaf, as in the rose. 



Fisr. '17. 



Pinnate ; Fig. 47, a, represents the petiole or principal leaf stalk 

 bearing leafets arranged opposite to each other ; these may be either 

 petioled or sessile, h^b, represent the stipules, the whole taken to- 

 gether forms one compound pinnate leaf The term pinnate is from 

 the Latin pinna., a wing or pinion. 



Binate ; when two leafets only spring from the petiole, as in Fig. 

 47, c. 



Fig. 48, 



Ternate ; when 

 three leafets arise 

 from the petiole, as 

 Fig. 48, a. Biternate 

 is a second division 

 of threes, as Fig. 

 48, b. Triternate is 

 a third division of 

 threes, as Fig. 48, c. 



Decompoimd, when a pinnate leaf is again divided, or has its leaves 



twice compound, 

 Fig. 49. /, ^ ^M' ^,M0 ^^ F'ig. 49, a. At 

 ' " ' 6, is a representa- 

 tion of tri-covi- 

 pound leaves. 



We shall now 

 add some miscella- 

 neous examples of 

 various kinds of 

 leaves for the ex- 

 amination of the 

 pupil. 



Fig. 50 at a, is a leaf of the Ilex aqiiifolium., (holly ;) it is oval and 

 dentate, with spinescent teeth. 



b, is a leaf of the Malvacrispa, (mallows ;) it is seven-lobed, crisped 

 or irregularly platted, and finely cremdate. 



c, is a leaf qf the Hydrocotyle iridentataj it is cuneiform, dentate at 

 the summit. 



d, is a leaf of the Cor chorus japonicus ; it is oval-acuminate, doubly 

 denticulate. 



Compound leaves— Pinnate — Binate— Ternate- 

 poufld— Size of le<tyes— Explain Fig, 5C, 



Biternate— Tritern ate— Decom- 



