IN "LILACDOM" 217 



will root in about six weeks, and in three years make 

 nice plants. Also they may be budded or grafted on 

 seedling stock of the Common Lilac and by this 

 method, although it is not to be recommended, sala- 

 ble plants are produced in two years. When pot- 

 ting the stocks carefully remove all adventitious 

 buds; suckers should not be used as stock since it is 

 impossible in these to control the development of 

 adventitious buds. But, after all, there is no valid 

 reason for propagating Lilacs other than by cuttings 

 for by this means the particular variety is on its own 

 roots and the advantage to the garden lover is obvious 

 and lasting. 



In the Arnold Arboretum about one hundred 

 and twenty named varieties of the Common Lilac 

 are cultivated and in addition some twenty species 

 and several hybrids, and the season of flowering lasts 

 from about the first of May to the first week of July. 

 In Highland Park, Rochester, N. Y., where great 

 attention has been given to these plants, there is the 

 most complete collection of the varieties of the Com- 

 mon Lilac to be found anywhere on this continent. 

 In all, this park has two hundred and ninety-seven 

 kinds of Lilacs and on May 22, 1915 "Lilac Sunday" 

 between the hours of six A. M. and eight p. M. some 

 fifty to sixty thousand people visited this collection. 



