86 



OBJECT LESSONS IN BOTANY. 



LESSON yi. 



MARGIN AND APEX. 



29. In describing a leaf we are to consider the patterns 

 of its border, or margin, which are quite varions, and often 

 eleirant. Some of the leaves heretofore noticed have the 



Fig. 49. Serrate leaf of Chestnut. 

 Fig. 50. Doubly serrate leaf of Elm. 

 Fig. 51. Dentate leaf of Arrow-wood 



( Viburnum dentatum). 

 Fig. 52,. Crenato leaf of Catmint. 



Fig. 53. Kepand leaf of Enchanter's 

 Ni-ght-shade {Circaa Lutetiana). 



Fig. 54. Undulate leaf of Shingle 0«k 

 {Q. imhricaria). 



Fig. 55. LooLd leaf of ChrysuKthemvm. 



margins entire and even, as in the Quince leaf, or tlie Lily. 



But most leaves are notched in various ways. For example, 



30. This Willow leaf (Fig. 3) is notched in the margin 



29. When is the margin said to be entire ? 



