May, 1921. 



The Canadian Field-Naturalist. 



83 



reference to tlie characteristic of the heal- 

 ing and overgrowth of stumps. In The 

 Trees of California (Cunningham, Curtis 

 and Welch, San Francisco, 1909) p. 33, 

 speaking of the second-growth circles of 

 the Redwood, Prof. Jepson refers to the 

 ■overgrowth of Douglas Fir stumps and 

 says "the caiise of this phenomenon is due, 

 undoubtedly, to natural rootgraf ting. " 



In" the Scientific American, Vol. CVIII, 

 No. 5, p. 112 (1913), continuity in vitality 



and healings and overgrowth of stumps of 

 Cuban Pine {Pinus heterophylla) , Long 

 Leaf Pine (Pinus palustris), and of stumps 

 of Douglas Fir, (Pseudotsuga taxifolia) 

 and Redwood {Sequoia gigantea) are spok- 

 en of as being a puzzle to the forester, and 

 the statement is made that it would seem 

 reasonable to conelude that these .stumps 

 are parasitic and that their roots are graf- 

 ted to tliose of neighbouring trees. 



In the article "Natural Grafting of Con- 



Fig. 2: Bigtiee, Sequoia washingtomana (Winsl.) Su.hvorth. Complotely capped-over 

 stump of a Calit'oniia Bigtiee, from the colleetion of the U. S. Forestry, Wash- 

 ington, D. C. Published ijy the t'ouvtesy of ^[r. G. B. Sudworth, Deuilrologist, 

 U. S. Forestry, Washington. D. C. 



