248 Rhodora [Novbmbbb 



Thuja in bogs, Pinna Bonksiana on dry ridges, sometimes not more 

 than two hundred feet from the Thuja, and north of Alden (mile 173) 

 the two were seen within twenty-five feet of one another, but it was 

 noteworthy that the cedars were on a shore, close to water, and the 

 pine on a gravelly ridge. Beyond Dreany (mile 182) the pine de- 

 scends into bogs, in company with Larix, but the character of the soil 

 in these is betrayed by the abundant presence of Ledum groeniandicum 

 and no Thuja was seen in them. A little farther north the pine forms 

 thick stands upon the drier ground, but soon after disappears. Be- 

 tween Franz (mile 195) and Hearst (mile 296) there are large calcareous 

 areas, for example at Gray (mile '229) and Akron (mile 233), with such 

 characteristic plants as Valeriana uiiginosa and Lonicera irivolucrata 

 and, of course, Thuja, and along this stretch, as well as from Hearst 

 eastward for one hundred and thirty miles to Cochrane, I saw no 

 Gray Pine. East of Cochrane, however, on the line of the National 

 Transcontinental Railway, I was able to make some further obser- 

 vations (the mileages being this time those from Quebec). East of 

 Nbrembega (mile 559) the first dray Pine appeared, and near Lake 

 Ahitibi (about mile 531) young trees of it grew infrequently by the 

 railroad track, as though adventive. Thuja was also seen, but in 

 bogs, and the two were not seen together. East of Balkam (about 

 mile 515) was Gray Pine unaccompanied by Thuja; east of Authicr 

 (mile 470) it was found in company with much Kalvria angustifolia; 

 about Amos (mile 433) it was abundant, but always without cedars. 

 Its presence or absence in a distance of two hundred miles which 1 

 passed after dark I cannot describe, but the next day I saw it near 

 Ferguson (mile 181), and near La Tuque (mile 129) it and Pinvs 

 resinosa were seen on ridges, with Thuja in low swampy ground. 



Naturally these observations lose much of their value without the 

 control of careful soil tests, which in a trip of this sort were obviously 

 impossible. Yet it may be safely be stated, so far as my observations 

 go, that whenever Pimu Ilauk.siaua and Thuja were both present at 

 one locality there was visible, even at a hasty glance from the train, 

 some decided difference in their habitats. That this difference, as I 

 have described it at Hawk Jc. and Alden, depended upon something 

 more than a mere question of moisture may also be inferred from the 

 fact that the pine was by no means limited to dry ridges, as the station 

 which 1 have described near Dreany well showed. Pin u,s> Banksiana will 

 apparently grow either upon dry sandy (or rocky) barrens or in wet 



