INTRODUCTION 7 



* Viola Selkirkii, Halenia deflexa, 



* Viola renifolia, Polemonium Van-Bruntiae, 

 Viola incognita, Blephilia hirsuta, 

 Epilobium striatum, Viburnum alnifolium, 

 Ligusticum scoticum, Lonicera coerulea, 



*Pyrola oxypetala, Lonicera canadensis, 



*Moneses uniflora, *Adoxa Moschatellina, 



*Ledum groenlandicum, * Valeriana uliginosa, 

 Azalea canescens, Lobelia Dortmanna, 



Rhodora canadensis, Solidago idiginosa, 



Kalmia polifolia, * Solidago macro pliylla, 

 Andromeda canescens, Aster junceus, 



*Vaccinium canadense, Bidens Beckii, 



* Vaccinium Brittonii, *Petasites palmata, 

 Chiogenes hispidida, Lactuca Morssii. 

 Naumburgia thyrsiflora, 



Of the 2,038 species, excluding weeds, in the range, the above 

 constitute 8.22 per cent, of the total. 



9. The glaciated portion of our range, besides being the home 

 of so many native plants not found elsewhere, is typified by the 

 large percentage of hard-wood trees, the relative scarcity, numer- 

 ically, of coniferous trees, and above all by the great number 

 (595) °f species that are introduced. Perhaps three fourths of all 

 adventive and naturalized species find their greatest development 

 in this area. That there is some relation between the vegetative 

 newness of this region and the preponderance of these adventive 

 weeds seems likely, and the much greater agricultural develop- 

 ment has undoubtedly had something to do with the weediness 

 of the region. It is significant that, in our range, the percentage 

 of weeds on the coastal plain is nothing like so great as in the 

 glaciated region. 



10. In speaking of the distribution of the species from a geo- 

 logical standpoint, it has seemed best to refer to all formations 

 north of the coastal plain simply as "Older Formations," notwith- 

 standing the fact that the glaciated part of the area thus char- 

 acterized is more recent phytogeographically, than the coastal 

 plain. (See paragraph 6.) 



