Hill: Penobscot Plants. 293 



these plants do not prefer the sterile soils, but rather are 

 repelled by lime and other basic elements and so are forced 

 to seek refuge in a soil which is neutral or even acid. 



As has been stated, the majoritv of (iirolinian species 

 reach their northern limits in the United States in ^ew 

 Jersey or southeastern Xew England. Some, however, ex- 

 tend northward to the sandplains of southwestern ]\raine, 

 and a few have pressed on to the sterile soils and granite 

 rocks of the eastern coast. Among such forms may be men- 

 tioned Piniis rif/ida, which extends to Mount Desert, and 

 Juncus (Ireenci, which reaches Koque Bluifs in Washington 

 County.' Other species, such as Corema- Con radii and Hud- 

 sonia ericoides, attain their northern limit in the United 

 States in this region but reappear in Xova Scotia and i^ew- 

 foundland. A few others have a continuous distribution 

 along the coast to Xewfoundland, i. e., Aste7' neinoralis 

 (Fig. 6). 



Other characteristic C^arolinian species fre(iuently found in 

 the eastern Penobscot Bay region include : 



Poiamogeton Oal^esiunus Eriocaidon sepiangiddrc 



Panicum implicatum Juncus effusiis, 

 AmntopliiJfi (tr-cnaria var. solidus 



Carex Jionnafliodc.s Mi/)'ica carolinensis 



Gnorr VI. Local Plaxts 



A very few of the native jilants of the region are extremely 

 local in distribution. Crafaer/us Jonesae is clearly endemic 

 in this general locality, ranging only from ]\rount Desert to 

 Casco Bay, a distance of about one hundred miles. Other 

 species, like Suaeda Bicliii and Sagina nodosa, var. glandii- 

 losa, extend only to Xova Scotia on the one side or Massa- 



1. Knowlton, C. H. Rhodora 17: 154 (1915). 



