349 



of the first steps, above the spiraea. Some of the leaves 

 of the suspensa are distinctly tri-foliate — three together, 

 one large and two tiny little ones, at its base. A hand- 

 some ailanthus stands by the second flight of steps. In 

 the fork by the mulberry, you will find some interesting 

 things. Just beyond the mulberry is a Washington 

 thorn, known by its thorns and cordate leaves. If you 

 take the right-hand branch of the fork here and follow 

 it around to a rock mass beyond, about midway between 

 fork and lamp, on the left of the Walk, is a good speci- 

 men of garden cherry, with reddish-brown, birch-like 

 bark. 



Prunus Americana. (Wild Yellow or Red Plum. 

 No. 25.) You can find this tree easily if you keep on 

 the path you followed to see the red mulberry, entering 

 from West One Hundred and Third Street. Follow 

 the branch path around by the rock mass, out upon the 

 Concourse Walk, turn off at the next fork of the Walk, 

 and go southerly. The tree stands by the left of the 

 Walk as you bend around to the west. It stands oppo- 

 site a black haw and a hackberry, on the south of the 

 Walk (your left now). The hackberry has oblique 

 leaves and warty ridges on its trunk. The black haw's 

 leaves have wings or flanges along their leaf-stems. 

 The wild plum is across the Walk, about midway be- 

 tween these two trees. It is a low tree, and you can pick 

 it out easily by its thorns, for it has plenty of them. Its 

 general form is round-headed, and the head is massed 

 thick with crooked and crowded branches. The older 

 branches are very thorny. In April or May the little 

 tree puts out its flowers, very pretty and tender to look 



