IRbofcora 



JOURNAL OF 



THE NEW ENGLAND BOTANICAL CLUB 



Vol. 23. November, 1921. No. 275. 



GRAY PINK AND ARBOR-VITAE. 



Arthur Stanley Pease. 



In an interesting article in Rhodora, xxi. 41-07 (1919), Professor 

 Fernald lias stated that Pinus Banksiana is confined to acid soils, 

 Thuja occidentalis chiefly to basic soils, reaching its maximum develop- 

 ment and its outlying stations only in positively calcareous areas. A 

 railway trip taken in June, 1921, in a region not very well known 

 botanically, gave the writer an opportunity to make from the car 

 windows some observations upon these two conspicuous species, arid 

 his notes may he worth concise presentation as evidence supplemen- 

 tary to that offered by Professor Fernald. • 



Across the southern part of the upper peninsula of Michigan, from 

 Gladstone to Manistique, barrens with Pinus Banksiana (and scattered 

 1'inus resinosa) were seen, but there was no Thuja near these species. 

 Along the line of the Algoma Central and Hudson Bay Railway, from 

 Sault Ste. Marie, Ont., northward for nearly three hundred miles I 

 made the following notes, the mileages given being those from Sault 

 Ste. Marie. Near Prater (mile 102) Gray Pine was reported to me by 

 an old resident as being very scarce; he had seen but two trees of it in 

 an experience of many years. Near O'Connor (mile 120) the first 

 trees of the species visible from the railroad began to appear; beyond 

 Agawa (mile 131) they became common, continuing near Tabor (mile 

 141), and largely found as a second growth after fires. Beyond Limer 

 (mile 150) there are barrens with Vaccinium -pennsylvanicum and its 

 var. nigrum and Gray Pine. During all these observations of Gray 

 Pine which I have mentioned no Thuja was seen anywhere in the 

 neighborhood. Near Hawk Jc. (mile 105), however, both are found, 



