Trees on Ma Gill University Grounds. 427 



weighing them down with its masses of foliage and fruit. 

 As already stated, it was used for training on dead trees, 

 etc., but latterly it was much affected, and its beauty des- 

 troyed by the attacks of a minute vine-fretter (Tettigonia) . 

 Its fruit is useless except for the plentiful colouring matter 

 which it contains. 



43. The Judas Tree. Oercis canadensis. 



We owe specimens of this shrub to the late Mr. Gibb. It 

 has, however, proved tender, even in a sheltered position, 

 and has not flowered. It does not seem to be suited to our 

 climate. Our largest specimen has been removed to the 

 new botanical garden, where, perhaps, it may be more 

 successful. 



44. The Sumach. Rhus typhina. 



This beautiful little tree is one of our best ornamental 

 plants and will grow on poor stony soil. Its straggling 

 habit of growth can be corrected by cutting down the tops 

 of the young shoots annually for a few years. The female 

 plant is much the best, being of more compact and vigorous 

 growth and retaining its dense panicles of red fruit through 

 the winter. In autumn the brilliant red leaves have a fine 

 appearance. The fruit, though dry, is greedily eaten by 

 some winter birds, and it is probably by the agency of these 

 that the species is so plentifully disseminated over the lower 

 part of the Mountain Park. Young plants trained separately 

 on single stems and pruned as above directed, have a very 

 fine appearance on exposed banks. 



45. The Shrubby Hollyhock. Hibiscus syriacm. 



I was much struck with the beauty of this plant as culti- 

 vated in the surburbs of Boston, and endeavoured to intro- 

 duce it on the College grounds. The attempt was, however, 

 unsuccessful. The tips were winter killed, and though I suc- 

 ceeded in having flowers for a few years, the plants ulti- 

 mately perished. 



