Butters: plant distribution in the Selkirk mountains 317 



contributions also from the mountains to the west and south of the 

 Silvertip glacier, and from the Palisade ridge lying northwest of 

 the upper part of the Sir Sandford glacier. These are largely mica 

 schist, but mingled with it are a few fragments of limestone, and 

 rather more of the brown talcose schist than occurs in the south 

 moraine. 



In the following tables the plants of each moraine have been 

 arranged in four lists according to their abundance. In each case 

 table A contains the names of the most abundant plants arranged 

 as nearly as possible in the order of their frequency. The trees 

 have been kept separate from the smaller plants on account of the 

 difficulty of comparing them directly. In the case of the south 

 moraine a special table (I: A, 2) is given, containing the names of 

 the most abundant plants upon the newest moraines, the pioneers 

 of the flora. No similar list was prepared in the case of the left 

 moraine, but the position of several of these plants is indicated 

 by notes in table II : A. Table B is an alphabetical list of all the 

 other plants considered to be abundant. Table C is an alphabetical 

 list of those plants which, although somewhat infrequent, neverthe- 

 less occur rather widely distributed. Table D contains the names of 

 plants which are very rare, having been found in only one or two 

 special localities. After each plant name is placed a letter showing 

 where it occurs in the corresponding tables for the other moraine. 

 At the end of these tables, a summary is given showing the relative 

 frequency of species on the two moraines. Four or five doubtful 

 cases due to failure to collect a species in such form that it could be 

 determined have here been included for the sake of completeness. 

 Where there is a possible corresponding species in the other lists, 

 such correspondence has been assumed to exist. 



I. TABLES showing THE ABUNDANCE OF DIFFERENT SPECIES UPON 

 THE SOUTH (calcareous) MORAINE 



Table I : A, 1. The most abundant plants arranged approxi- 

 mately in the order of their abundance. 



Occurrence on 



north moraine Notes 



Trees : 



Picea Engelmanni Parry in Engelm. C 



Abies lasiocarpa (Hook.) Nutt. A 



Herbs and shrubs : 



Anemone Drummondii S. Wats. — 



