Plate XVI. 



SUMMIT OF LEAF. 



53 



Ccnoral subject. Name each of the forms from fig. 1 to 8. To which of 

 these may the character of the leaf-summit in fig", 10 be referre-d — fig. 18 — fi^' 

 9 ? What kind of appendage in fig. 11 ? Difference between figa. 4 and 5 — I 

 and 8—7 and 8— S and 8 ? "What kind of leaf at fig. 14^ and to what tribe of 

 plants does it belong— fig. 12— fig. 15 ? "When a leaf has a curved and attenu- 

 ated point, what is it called — a sharp point— ending in a kind of bristle— with 

 a rounded notch — a sharp notch — a blunt end — appearing as if cut off at thi- 

 extremity ? Instances of each form. 



