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from this cold interior region it was brought to the Arboretum in 1879. 
It is the largest and handsomest of the Arborvitaes and has proved to 
be one of the most satisfactory conifers which have been planted in 
the Arboretum. There are several specimens of the Serbian Spruce 
in the collection planted in 1886. It is perfectly hardy and one of the 
handsomest Spruce-trees which can be grown here. Unfortunately the 
leader is too otten destroyed by the borer which disfigures Pinus Stro- 
bus and other White Pines. What is probably one of the best speci- 
mens in the United States of that form of Pinus parviflora with wide- 
spreading branches so common in Japanese gardens has been growing 
in the Arboretum since 1881. There is also a specimen here of the wild 
form of this tree from the forests of northern Hondo which was once 
called Pinus pentaphylla. Fortunately Pinus parviflora is not injured 
by the borer which destroys the leaders of many White Pines, but it 
is somewhat disfigured by the cones which are very numerous, and, 
persistent for a long time on the branches, turn nearly black before 
falling. Pseudolarix, the so-called Golden Larch of Japan, is one of 
the handsomest and hardiest exotic trees which can be grown in the 
eastern United States into which it was introduced more than sixty 
years ago. It was not planted in the Arboretum until 1891, but the 
trees here are large enough to show their beauty and are already pro- 
ducing seeds. Pinus monticola^ the western White Pine, is not as 
handsome as our native Pinus Strobus and will probably never be much 
planted in the eastern states. It is interesting, however, as the only 
Pine-tree of western North America, one of the chief homes of the 
genus, which is really hardy in the east. It has not yet been injured 
here by borers. The Rocky Mountain form of the Douglas Spruce is 
now too well known in eastern plantations to require comment. 
Junipers. The Arboretum collection of Junipers has improved in the 
last three or four years and now contains many interesting and healthy 
plants. It must be remembered, however, that the northeastern part 
of the United States has not the climate needed for the large number 
of the species which grow naturally either * in warmer countries or in 
regions of small summer rainfall or of high altitude. The range of 
variation of the so-called Red Cedar, Juniperus virginiana, although 
a much handsomer plant south of New England than it is here, is now 
well shown in the Arboretum collection which contains eighteen named 
varieties of this tree. Nearly all of these varieties are distinct, but in 
some cases the same or nearly the same plant has come to the Arbor- 
etum under more than one name. In color the most distinct of the 
varieties of the Red Cedar is the var. glauca with steel gray leaves, 
represented in the collection by a number of plants varying somewhat 
in habit but little in color. This form has not been attacked here by 
the red spider or by the other insects and the diseases which often dis- 
figure and sometimes kill the common green-leaved form of this tree 
in Massachusetts. With the exception of Abies concolor this Juniper is 
the handsomest of the gray-leaved conifers which can be grown in this 
climate. Juniperus virginiana globosa, a plant with a cylindric, round- 
topped little head which came from a Dutch Nursery, is interesting to 
the students of the now popular dwarf conifers. More beautiful is an- 
other Dutch form (var. Kosteriana), a flat- topped shrub from two to 
