Trees on McGill University Grounds. 419 



of dead twigs. The variety which has succeeded best is 

 that having the roughest and most corky bark. The 

 plants now in front of my residence, though mere shrubs, 

 are about thirty years of age. 



24. The Sycamore Maple. Acer pseudo-platanus. 



A fine healthy specimen of this tree was presented by the 

 late Mr. Gribb and proved to be hardy and a vigorous 

 grower, while its great glossy leaves were more showy than 

 those of any of our other maples. It had attained to a 

 height of more than thirty feet, and was a beautiful and 

 shapely tree. Being a little removed from the new build- 

 ings I had hoped that it might be preserved ; but on occa- 

 sion of cutting down some common trees which were in the 

 way, the workman extended his commission to this tree 

 also, and I arrived on the ground too late to save it. 



25. The Ash-leaved Maple. Negundo aceroides. 



Our experience with this handsome tree is of interest, as 

 showing the difference in hardiness of specimens from 

 different localities, a point to which attention has recently 

 been directed by Mr. Fletcher, of the Experimental Farm, 

 Ottawa. Desiring to introduce the tree as a botanical 

 specimen, in consequence of the peculiar form of its leaf, I 

 purchased some plants from a nursery in the State of New 

 York, but was much disappointed with the result. The 

 ends of the twigs were winter-killed and the trees soon 

 began to lose their beauty in consequence, so that I regarded 

 the experiment as a failure. A little later some seeds from 

 Manitoba were sent to me in a letter by Dr. Gr. M. Dawson 

 and produced healthy plants, which showed no sign of 

 winter-killing, and now I have healthy and vigorous trees 

 perfectly suited to the climate. They have already borne 

 abundance of seed which has been cultivated by Dr. 

 Harrington, and numerous plants have been distributed by 

 him. He has even found that this progeny of the North- 

 west Negundo will grow successfully as far to the North- 



