288 Proceedings Port. Soe. Nat. Hist. 



As lias been stated, the xVlleghaiiian zone proper docs not 

 extend far into Xew England, bnt the inllnence of the ocean 

 renders conditions along the coast equable enongh so that 

 some of these anstral forms have exceeded their general 

 limits and pressed mncli farther nortlnvard. The distribu- 

 tion of these ontpost species is bv no means continuous and 

 tlie plants occur in isolated localities, a behavior characteris- 

 tic of species at the edge of their r'inge/ As we have noted, 

 certain of these southern forms are to be found in Cape 

 Breton and Newfoundland. These arc included in the pre- 

 ceding group since it is hard to distinguish them from 

 Canadian species, and only those forms which attain their 

 northern limit in ]\raine, Xew Brunswick or southern Xova 

 Scotia and Avhicli show a definite Alleghanian distril)ution 

 are considered as belonging here. 



The habitats of these Alleghanian species in the eastern 

 Penobscot Bay region vary. Some of them occur in wet 

 places: Varcinium atrococcum, Fraxinus penn.si/Ivanira, and 

 Vihurnum denfatum in swampy woods; Decodon vPrfiriJ- 

 hdus, var. laerigafus, on pond shores; and Bainninilus Ja.n- 

 caidis, locally common in muddy l)og holes at South Deer 

 Isle, its present northern limit. 



Other species frequent dry open fields: Liliiun pliilndeJ- 

 phicum, Polijgaln sanrjuinea, and P. verticdJafa, Lecliea in- 

 termedia, Lysimachia quad ri folia, and Antennaria ParlinH. 

 Still others are found in the dry leaf mould of woods: 

 Oahesia sessilifolia, Polygonatum hiflorum, and Pediculari.9 

 canadensis. 



The striking feature in connection with the Alleghanian 

 Hora is not the presence of these few isolated plants of swamps 

 and dry woods but rather the almost complete absence of the 



1. Griggs. Observations on the Behavior of Some Species at the 

 Edges of their Ranges. Bull. Torr. Bot. Club 41: 25-49 (1914). 



