112 REPORT OF NEW JERSEY STATE MUSEUM. 



Maryland is distinctly affiliated with the Middle District flora of 

 New Jersey and not with that of the Pine Barrens. 



The investigations of the members of the Philadelphia Botani- 

 cal Club in the State of Delaware would indicate that conditions 

 there are very similar, that is to say, that the New Jersey Pine 

 Barren element in the flora is very slight.* 



The so-called Pine Barrens of hong Island are decidedly weak 

 in the characteristic Pine Barren plants and take their place with 

 the several Pine Barren islands which are scattered here and there 

 through the Middle District of New Jersey. Of sixty-two species 

 listed in several papers on the subjectf only twenty-six are in- 

 cluded in my list of typical New Jersey Pine Barren plants (p. 

 yy), the rest being equally common throughout our region or re- 

 stricted to the Middle District. Of the twenty-six, six occur at 

 one outlying station, thirteen at two and four at three, while 

 only three, Dryopteris simulata, Chrysopsis falcata and Arenaria 

 caroliniana are confined to the Pines in New Jersey, and the first 

 two of these are not found in the more Southern Pine Barrens, 

 the Dryopteris being possibly of boreal affinities. 



It would seem, therefore, that we have in the New Jersey and 

 North Carolina Pine Barrens the sand and bog elements of a 

 wide-spread American austral flora, which has been largely super- 

 seded by a more advanced element of similar origin over the rest 

 of the coastal plain, both elements being richer the farther south 

 we go, while along the western edge of the coastal plain, mofe 

 especially to the northward, a boreal element has spread down 

 over the fall line to a greater or less degree. 



* Cf. C. F. Williamson, Torreya, igog, p. 160 ; R. Harper, Torreya, 1909, p. 

 217. 



t N. L. Britton, Bull. Torr. Bot. Club VII, p. 81 (1880). 

 A. J. Grout, Torreya II, p. 49 (1902). 

 S. E. Jeliffe, Torreya IV, p. 97 (1904). 

 R. M. Harper, Torreya VIII, p. i (1908). 



