26 



OBJECT LESSONS IN BOTANY. 



LESSON VI. 



MARGIN AND APEX. 



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

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

 elegant. 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., Crenate leaf of Catmint. 



Fig. 53. Eepand leaf of Enclianter'a 

 Ni-glit-shade {Circcea Lutetiana). 



Fig. 54. Undulate leaf of Shingle Oak 

 {Q. imbricaria). 



Fig. 55. Lobcd leaf of CJirysanthemum. 



margins entire and even, as in the Qnince 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. WLen is the margin said to be entire? 



