MISSOURI BOTANICAL GARDEN BULLETIN 49 
The elm, which is frequently used as a shade tree in 
eastern cities, suffers severely during the hot summer sea- 
son and is also subject to the attack of bark diseases. On 
that account it is not desirable to plant elms, except in the 
out-lying regions, where they can be given very special care. 
In making a selection as to the kind of tree to plant on 
a street, consideration should be given to the varieties of 
trees already existing there. Under an ordinance passed 
several years ago, anyone desiring to plant a tree on a street 
must obtain a permit from the office of the City Forester. 
Under this same ordinance, as recently amended, permis- 
sion is given to the property owners on any given street to 
make a selection of a tree species, so that when plantings 
are made on such street uniformity is assured, making it 
a more attractive thoroughfare. The revised section of the 
_ ordinance, as it is now in effect, reads: 
“Tf the property holders along any given street, upon due notice 
sa to do from the City Forester, shall fail to make the selection 
provided for by Section 1254 hereof, within six months next after 
notice has been given, then it shall be the duty of the City Forester 
to select a variety of shade trees for such street or blocks of such 
street which shail thereafter be the only variety which shall be 
planted on said street or blocks of said street, provided, however, 
that if thereafter 4 majority of the property owners on any two 
or more contiguous blocks shall petition the City Forester to change 
the selection so made under the provision of this Section to a more 
suitable variety, and the City Forester approve the change, then 
the trees planted thereafter on said street or blocks of said street 
shall be the variety last so approved.” 
WHEN TO PLANT. 
Trees may be planted either in the fall or spring, but for 
various reasons it will be preferable to plant in the earl 
spring; that is, just as soon as the ground is in a workable 
condition. This is usually the latter part of March and 
early April. 
WHERE TO PURCHASE TREES. 
One of the chief reasons why many of the trees planted 
in city streets fail to grow ies He that sufficient care 
and attention are not given to the kind of trees purchased 
and to the conditions under which young trees are trans- 
planted from a nursery to the street. It is by no means 
rare to see wagons driving along the streets in the spring 
loaded with young shade trees, in which no attempt is made 
to protect the roots from the sun and wind. Under such 
conditions it is not difficult to see why these trees will not 
