164 THE CANADIAN NATURALIST. [June 



prasnm), the latter being frequently met with on rocky and 

 gravelly shores ; also Aster graminifoUus, Anemone Pennsi/lvanica, 

 a very showy plant, with large white flowers, Nasturtium palustre, 

 var. hispidum, Parnassia palustris, the White Silver Maple 

 (^Acer dasi/carpimi), the Dwarf Cherry (P/imus pumihi'), the 

 Black Alder (^Ilex verticillata), one of the Loosestrifes (Lysi- 

 machia ciliata), the Bracted Bindweed (Calj/stegid sepium), 

 more commonly called Convolvulus, whose delicate white flowers, 

 tinged with pink, present a beautiful contrast to the labyrinth of 

 foliage with which they are entwined ; also the Water Persicaria 

 {Polygonum amphiblinn), the Canadian Wood Nettle (Laportea 

 Canadensis^, Sparqanium racemosum, and the Canadian Lily 

 (^Lilium Canadense). Another plant, the "Sweet Coltsfoot," 

 (^Nardosmia Palmata'), if not introduced by birds, probably 

 immigrated at a much earlier period (the Post-Pliocene), as it 

 grows far above the piesent level of the river. 



While many North -Western and Western species have, by the 

 spring floods of the river, or other means, been thrust into the 

 group of species which characterize the coastal zone, others have 

 been held at bay on the St. John River by the cool temperature 

 and damp atmosphere, which prevail near its mouth during the 

 summer months. 



From the observations presented in the foregoing pages, the 

 following conclusions may be drawn : — 1st, One of the most 

 peculiar features in the flora of the region to which these remarks 

 relate, is the arrangement of several of the types mentioned, in 

 zones around a central tract, due to the refrigerating influence of 

 cold waters on the adjacent seas. 2d, That although there are 

 highlands of considerable elevation in Acadia, they do not 

 appear to exercise a very marked influence on the vegetation, 

 except in so far as they act as a barrier to the oceanic winds. 

 3rd, That on account of its semi-insular position, and its full 

 exposure to the chilling efiect of the Arctic current, the maritime 

 parts of this country have become the home of northern species 

 not found within the limits of New England, and of many others 

 which grow only on mountain tops, or cold, sheltered places, in 

 that part of the United States. 4th, That although the sea- 

 coast of Aciidia is thus inhospitable, the interior has a summer 

 climate so warm as to encourage the growth of a group of plants^ 

 which the damps and chill winds of the same season exclude from 

 New England; such species being either entirely absent from 



