EXPLANATIONS. 



The Synonymy consists of a reference to the original place of publication, 

 with the type locality, and to the principal works on the region under con- 

 sideration. 



The Statement on Range of each species covers the entire State, the portion 

 that refers to northern New Jersey being taken from Britton's Catalogue. 



The List of Localities includes all herbarium specimens examined, and also 

 records published in Britton's Catalogue and Keller and Brown's List, which 

 I have no reason to doubt, even though specimens have not been seen. When 

 records given in these two works are not substantiated by specimens from 

 nearby stations or for any other reason seem open to question, they are dis- 

 cussed in foot notes. (Cf. Preface.) 



When no letter is given after a locality it indicates that a specimen from 

 this locality is in the Herbarium of the Philadelphia Academy. Specimens in 

 other herbaria arc indicated as follows : 



OHB=0. H. Brown. P=Princeton University. 



H=Benjamin Heritage. S=Witmer Stone. 



CDL=Chas. D. Lippincott. UP=:University of Penna. 



L=Bayard Long. C=Record taken from Britton's 



NB=N. J. Agricultural Exp. Sta., Catalogue. 



New Brunswick. KB:=Records from Keller and 



T=N. J. State Museum, Trenton. Brown's List. 



NY=N. Y. Botanic Garden. Kn=Records from Knieskern's List. 

 CPr=Phila. College of Pharmacy. 



The exact location of the stations cited and some details as to the character 

 of their flora will be found in the list of localities, p. 780. 



The Keys for Identification are applicable only to the region here con- 

 sidered, and are intentionally artificial in character, being intended merely to 

 contrast the most obvious characters of our plants as an aid to identification. 

 They are not supposed to take the place of a Botanical Manual, a work 

 which all students must have. 



These Keys also cover all the common weeds of our region. Their names 

 are enclosed in brackets with foot-note references, but they do not appear in 

 the main text. 



The Flowering and Fruiting Season (By Mr. Bayard Long) — The feeling 

 that in a local flora the actual seasons of flowering and fruiting of the species 

 in the region under consideration are of considerable interest and value, and 

 the realization of the unsatisfactory nature, from a local standpoint, of this 

 sort of data as presented in the manuals have led to the present attempt to 

 designate the flowering and fruiting ■reasons of the indigenous plants of 



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