INTRODUCTION. 



as one travels eastward, each in its turn disappears. At Smith- 

 boro the last of Dianthera A))ierirana is seen; Staphylea trifo- 

 //ii/a and Asc/cpi\is tuber osa become rare at Apalachin and dis- 

 appear at Binghamton. Menispermiim Canadense and Diosco- 

 ;-^tf T'///(U<? are not found much beyond Binghamton; Celtis Occi- 

 dent alis is common as far as Apalachin, and becoming rare, dis- 

 appears at Binghamton, as does also Leptandra Virgmica. Sev- 

 eral others show this peculiarity of distribution in various degrees. 



STATISTICS OF THE FLORA. 



Although the list of species includes all that are at present 

 known to grow without cultivation within our limits, a comparison 

 of the flora with others upon the mere basis of numbers would be 

 unfair at this time. In our efforts to make this first published list 

 of the plants of our region thoroughly authentic, many plants that 

 doubtless should have had a place have been excluded. The 

 practice has been to throw out every species about which there 

 might be the slightest doubt. It is gratifying, however, to report 

 more than a thousand species. The position our flora holds in 

 relation to others with regard to numbers is shown by the follow- 

 ing table: 



Plants of Monroe county, etc., N. Y ii3i4 



Cayuga Flora 1,278 



Plants of Buffalo and vicinity 1.243 



Flora of Wyoming and Lackawanna valleys, i, 107 



Flora of the Upper Susquehanna 1,105 



Plants of Dutchess county, N. Y 1,067 



Plants of Suffolk county, N. Y 852 



A comparison of our list of species with the larger lists will 

 show that had we included the common escapes of the garden and 

 counted a considerable number of native varieties, as has been 

 done with them, the difference in numbers would be slight, if any. 



NOMENCLATURE OF THE LIST. 



The nomenclature of the list throughout is that of the *' List 

 of the Pteridophyta and Spermatophyta growing without cultiva- 

 tion in Northeastern America," published as Volume V. of the 

 "Memoirs of the Torrey Botanical Club." When these names dif- 

 fer from the names in the sixth edition of "Gray's Manual," the 

 names of the latter follow in parenthesis the remarks on the species. 



