454 
THE FLOWER GARDEN. 
to plant some of our beautiful flowering trees in its place. It 
is, however, a useful tree to plant as a boundary screen. By 
shortening the shoots on each side annually a dense wall of 
green leafage can then be obtained in summer. Other species 
are T. argentea, cordata and platyphyllos, kinds suitable only 
for park planting. The Lime succeeds in any soil, should 
be planted in autumn, and is increased by layering. 
Tsug^a. (Hemlock Spruce). — T. canadensis is a hardy 
evergreen coniferous tree, and a native of N.E. America. It 
is one of the most graceful conifers grown in this country. It 
grows upwards of 6oft. high, and has feathery branches which 
impart to the tree a most beautiful aspect. This tree is only 
suitable for large gardens, where it should be planted in a 
moist, deep, moderately light soil. Plant in May or September. 
Increased by seeds sown in sandy soil in a cold frame. 
Ulmus (Elm). — The Common Elm (U. campestris) is of 
no value as a garden tree, but the Wych Elm (U. montana) and 
its varieties are worthy of a place in large gardens and parks. 
The Wych Elm is a handsome tree with spreading branches 
well suited for large lawns, or for street planting in seaside 
districts. Pendula is a weeping form, and comubiensis 
(Cornish Elm) is also a good variety, which is later in leafing 
than most kinds. These trees will thrive in ordinary soil. 
