PEEFACE Vll 



species discovered by Wilson in his four journeys. It is safe to 

 say that few travelers, however, have discovered as many new 

 plants; certainly no other man has ever introduced so many 

 woody plants of exceptional interest and value into cultivation. 

 This will appear when it is realized that in the first volume of 

 the Plantae Wilsonianae, which we believe contains the enumer- 

 ation of about one-half of Wilson's Arboretum collections, there 

 are described two new genera, two hundred and twenty-five 

 new species and one hundred and sixty-two new varieties of 

 woody plants. In earlier publications have appeared descrip- 

 tions of two new genera and about one hundred new species of 

 woody plants discovered by Wilson in his first journeys. 



In the preparation of this work the Arboretum is indebted to 

 a number of European specialists who have elaborated several 

 different groups, and I take this opportunity to extend to them 

 the cordial thanks of the Arboretum. 



C. S. Sargent. 



May, 1913. 



