26 
to its vast importance. A large amount of close observations 
and experimental work is necessary in order to decide which new 
species are likely to give better results than those at present 
under cultivation, and no doubt experimental forest-gardens 
and demonstration forests would provide a means of answering 
many of those highly important questions. 
EXPLANATION OF THE FIGURES IN PLATE LV. 
Illustrating Dr. A. W. Borthwick’s paper on “ Peziza Willkommii, R.H., 
on Larix occidentalis, Nutt., and Larix leptolepis, Gord.” 
Fie. 1. Apical settee of young Larix occidentalis, some where the canker 
riginated at the base of the shoot of 190 
figs 2. The cankered area at the bas ae me shoot of 1907, showing the fructifica- 
of Peziza Willkom 
Fic. 3. Portion “of ae of Larix leptolepis with two cankered areas, the lower 
en in surface view, the higher one seen in pro: 
Fic. 4. Part of f the “highes canker in Fig. 3, magnified, showing the fructifications 
of P. Wilikommit 
