FOREST TREES. 153 
This species, which is not found so far north as 
the preceding, is by some considered a variety of it, 
and differs principally in the greater size of its leaves 
and flowers, and the inferior magnitude of the tree. 
The qualities of the wood and bark are the same as 
in the preceding species. As an ornamental tree it 
is considered superior. Meehan says that the most 
common Weeping Linden of the nurseries is of this 
species. It is propagated like the preceding. 
3. Tilia Huropea-—LHEuropean Linden. 
Leaves, cordate, acuminate, serrate, smooth be- 
neath, twice the length of the petioles; petals with- 
out scales, 
The European Linden, like the American, is a tree 
of large size. It has been much planted for shade 
in and around cities in the Atlantic States. Its 
leaves are smaller, and its foliage more dense than in 
the American tree, but it is apt to cast its leaves very 
early in autumn. It does not appear to thrive in the 
soil of the Illinois prairies. The wood resembles 
that of the American species, and the imported bass 
matting is made from the bark. It is propagated 
principally by layers. 
ULMUS—ELM. 
Natural Order, Urticaceaw. 
Calyx, bell-shaped, four to nine-cleft; stamens, 
four to nine; ovary, flat, two-celled; styles, two; 
fruit, one-celled, one-seeded, winged all round. 
