PLA^^TS OF SOUTHERN NEW JERSEY. 33 



The writer has also traveled over all the railroads traversing 

 South Jersey, and car-window data and general note-book records 

 of conspicuous species have been used as supplementary evi- 

 dence in estimating- abundance in the general statements accom- 

 panying each species. 



The entire series of South Jersey plants in the Academy her- 

 l^arium was gone over critically by the writer in 1908, and subse- 

 quently much of this material has been reviewed by Mr. Bayard 

 Long and many difficult groups have been worked over by one or 

 both of the above. Other questions of the identity oi various 

 South Jersey species have been investigated by members of the 

 Philadelphia Botanical Club, whose work has been of the greatest 

 benefit to the writer. In this connectiort, too, he must express his 

 indebtedness to a number of botanists who have directly or in- 

 directly aided his work by identifying material sent to them or 

 by examining specimens in their institutions — Prof. M. L. 

 Fernald, Dr. B. L. Robinson, Dr. N. L. Britton, Dr. J. K. Small, 

 Mr. Norman Taylor, Mr. A. S. Hitchcock, Mrs. Agnes Chase, 

 Mr. K. K. Mackenzie. 



The statements on the time of flowering and fruiting of each 

 species have been drawn up almost entirely by Mr. Bayard Long 

 from the Academv Herbarium, his own and that of the writer. 

 The results form an exceedingly valuable contribution to a sub- 

 ject that is too often treated loosely and accompanied by little or 

 no original research. Mr. Long has prepared some account of 

 the methods employed and the objects sought in this investiga- 

 tion, which will be found on p. 115. 



As explained beyond (p. 70), ecologic problems have neces- 

 sarily received scant attention, the aim of the work being to 

 present facts of distribution from a geographic point of view for 

 all plants of the region as a necessary preliminary to more com- 

 prehensive discussions of both geographic and ecologic distribu- 

 tion in the future. 



While a local flora such as the present one is of the greatest 

 assistance to the student, it is impossible to expect it to take the 

 place of a Manual. Every botanist must have access to either 

 Britton' s Manual, the new Gray's Manual or one of the more 



3 MUS 



