May, 1921.] 



The Canadian Field-Naturalist. 



83 



reference to the 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 cause of this phenomenon is due, 

 undoubtedly, to natural rootgraf ting. " 



In the Scieniific 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 conclude that these stumps 

 are parasitic and that their roots are graf- 

 ted to those of neighbouring trees. 



In the article "Natural Grafting of Con- 



Fig. 2: Bigtree, Sequoia washingtoniana CWinsl.) Sudworth. Completely capped-over 

 stump of a California Bigtree, from the collection of the IT. S. Forestry, Wash- 

 ington, D. C. PuVjlished by the courtesy of Mr. G. B. Sudworth, Dendrologist, 

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



