36 The Ottawa Naturalist. [May 



The terminal twigs are fine, and have an elm-like appearance. 

 It seems to be a valuable and long-lived shade tree. 



Rosacea. 



The only species that calls for our attention as a shade tree 

 is the Mountain Ash. This is fairly common. Its bright red 

 berries are conspicuous during the fall and early part of the 

 winter, and make it a deservedly popular ornamental tree. 

 There are several varieties of the European Rowan Tree, Pyrus 

 auctiparia* The American one, P. americana is at its best in 

 our latitude. It becomes a shrub farther south, and extends 

 far north to the shores of James Bay. 



Leguminos^;. 



The Kentucky Coffee Tree, Gymnocladus dioica or canadensis 

 is far from home in this latitude. There is only one specimen, 

 so far as I know, growing in the city. It is on the Normal School 

 grounds on Elgin St., but there are several at the Experimental 

 Farm. This tree is remarkably homely in winter. Its smaller 

 branches are so thick and blunt, and its leaves so late in coming 

 out that it has earned the title, Chicot, the dead tree, among our 

 French-Canadian neighbors. But, in summer its leaves are 

 characteristic and beautiful. It is one of the very few trees that 

 produce doubly compound leaves. 



The only other large tree that produces such leaves is the 

 Hone}' Locust, Gleditsia tnacanthos. It grows at the Experi- 

 mental Farm and is marked as half-hardy. 



The Common Locust, Robinia pseudacacia would be far 

 more valuable both as a shade tree and for its timber if it could 

 be effectually protected from the ravages of boring insects. 

 There is almost an avenue of these trees near Rockcliffe, and the 

 street is appropriately named, Acacia Avenue, but it is a rare 

 tree in other parts of the city. Some say it is not a beautiful 

 tree in winter. Its bark is deeply furrowed, and inclined to 

 scale; the trunk is often twisted, the branches are irregular and 

 contorted and twiggv. The seed-pods hang on the tree all winter. 



(To be continued.) 



* One member here stated that all the mountain ashes about the city 

 belong to the introduced European species, and that it is even spreading 

 to nearby woods. 



