1 906 J Plants from the Canadian Rockies and Selkirks. 105 



SOME NEW PLANTS FROM THE CANADIAN ROCKIES 



AND SELKIRKS. 



Edith M. Farr. 



In the summer of 1904 I collected specimens of a Pachystima 

 which proved upon examination to be a hitherto undescribed 

 species and was given the name of P. macrophyllum. It was 

 found in fruit at Bear Creek Station in the Selkirks while the more 

 usual form, P. Myrsinites, was collected in flower in the 

 month of May, at Cedar Creek, in the same range of mountains. 

 In order to complete the study of these forms it was necessary 

 to secure specimens of P. macrophyllum, in flower, and of P. 

 Myrsinites in fruit. Accordingly a special effort to that end 

 was made this past summer when the region of the Selkirk 

 Mts. was again visited. P. macrophyllum was obtained in full 

 flower at Bear Creek Station on the twenty-fifth of May, P. 

 Myrsinites in flower at Six Mile Creek on the eighteenth of 

 May, and at Glacier on the twenty-sixth of the same month. 

 During the first week in August P. Myrsinites was found in fruit 

 at Glacier so that the two forms were then complete. 



In genera! appearance the two differ widely, and this is 

 especially evident when they are both seen at the same season of 

 the year, As stated in the paper published in November, 1904, 

 in the "Contributions from the Botanical Laboratory of the 

 University of Pennsylvania," P. Myrsinites is of compact habit, 

 the branches being erect and stiff, the leaves arranged in a 

 decussate manner, giving a bushy appearance to the shrub. 

 Further, the entire plant has a yellowish tone, while the leaves 

 are thicker and more rounded than in P. macrophyllum. P. 

 macrophyllum is of a loosely spreading habit, the branches being 

 somewhat drooping and graceful, the leaves spreading in such 

 a manner as to give a 2-ranked, flattened appearance to the 

 branches. This species has a bright, almost bluish green tone as 

 compared with P. Myrsinites, and the leaves are, as a rule, 

 three to five times as long as broad. 



Still another form was collected at Bear Creek Station, the 

 same locality in which P. macrophyllum has been found. This 

 plant was collected by Mrs. Charles Schaffer, and I take the 



