6o REPORT OF NEW JERSEY STATE MUSEUM. 



Eroni tlie above list we may compute : 



After exclud- 

 ing obvious 

 introductions 

 front other 

 districts. 



Total Flora of Pine Barrens, 565* 386 



" " " Coast Strip (excluding Halophytes),. . 524 492 



" Cape May District, 658 649 



" " " Middle District, 1 138 1023 



Common to Middle and Pine Barren Districts, 470* 295 



" " " " Coast Districts, 416 410 



" " " " Cape May Districts, ^7,^ 493 



" " Pine Barren and Coast Districts, 263! 162 



" " " " Cape May Districts, 368 252 



" " Coast and Cape May Districts, 359 3^7 



The status of each species in the above table was ascertained 

 by a careful study of the data presented in the main text of this 

 report after excluding such records as bore evidence of being 

 based upon accidental occurrences such as roadside or railroad 

 introductions. All w^eeds, even those of native origin, were also 

 excluded, as their distribution has little or no bearing upon 

 natural conditions. 



A further study of the data covering the general range of 

 the south Jersey plants (see p. 47) gives the following results 

 for the flora of each of the four districts considered separately : 



M. PB. C. CM. 



Wide Ranging, 628 153 301 359 



Northern Element, 78 28 26 16 



Southern Element, 299 183 159 263 



L,ocal Element, 18 17 6 11 



1023 386 492 649 



M. PB. C. CM. 



Percentage of Southern Element, 29% 48% 31% 40% 



* As explained beyond, these figures include a number of recent introduc- 

 tions not really native to the Pine Barrens. See p. loi. 



t These figures are somewhat misleading, as only such Pine Barren species 

 as reach the Coast Islands are included. The mainland coast strip is so 

 narrow that it is impossible to mark it off sharply from the Pine Barrens, 

 and we cannot say which Pine Barren species spread into it and which do 

 not, without a vast amount of further study. 



