2 
probably not recover. Other interesting young trees which have been 
badly injured by mice are Acer mandshuricum, the great Box Elder of 
northern Korea and Manchuria and Acer Davidii from western China. 
Rhododendrons, Kalmias and broad-leaved Evergreens are generally in 
good condition, although the Kalmias which last year produced an un- 
usually large crop of flowers this year are carrying few flower-buds. 
A few conifers have suffered, but the damage to these plants is less 
serious than it was two years ago, and, judging by reports from Long 
Island and the middle states, the Arboretum conifers have suffered less 
than those in some of the collections further south. The young Cedars 
of Lebanon raised from seeds gathered in Asia Minor, and for many 
years believed to be proof against the rigors of the New England win- 
ter, have lost or will lose many leaves as they did for the first time 
two years ago. The buds appear to be uninjured and the trees will 
undoubedly put out new leaves. Their spring beauty, however, is 
spoiled, and such losses of foliage will check their growth which up to 
two years ago had been more rapid than that of any other conifer in 
the collection. Two years ago the numerous specimens in the Arbore- 
tum of the Black Pine of Japan (Pinus Thunbergii) lost much of their 
foliage and the trees look even worse now than they did two years 
ago. The buds are generally alive, but it will be a long time before 
these trees regain their former vigor. This Black Pine is a southern 
sea-level tree and in this country is more picturesque than beautiful. In 
Tokyo, however, and by the sides of the great southern Japanese shore 
highway there are magnificent specimens. Raised at the Arboretum 
from seeds planted in 1893, Finns Thunbergii was never injured here 
until the cold of the wflnter of 1917-18 ruined its foliage. The short- 
leaved southern Pine {Finns ecJunata) has lost many leaves again as it 
did two years ago; and although this valuable tree finds its northern 
home on Staten Island and Long Island, New York, it will probably 
never grow to a large size here or prove itself important for the dec- 
oration of northern parks. The oldest specimen in the collection was 
raised here in 1879 from seeds collected at the Peaks of Otter in Vir- 
ginia and has suffered less than the younger trees raised from Staten 
Island seeds. Young plants of the Mexican White Pine {Finns ayaca- 
huite) which have been growing in the Arboretum for several years 
and have not before been injured by cold look as if they had been 
browned by fire and will probably die. Small plants of Abies mag- 
nifica, the great Red Fir of the California Sierra Nevada, and A. ceph- 
alonica var Apollinis, from southeastern Europe, both trees of doubt- 
ful hardiness, are killed; and of the three trees of the California form 
of Abies concolor the A. Lowiana of English nurserymen and the A. 
Parsonsii of some American gardens, the leaves of two are for the 
first time badly browned, while those of the third are uninjured. Here 
and there a branch with brown leaves appears in the Pinetum, but on 
the whole the collection of conifers is in better condition than might 
have been expected. Among the trees which do not grow naturally in 
New England three are now conspicuous by the freshness and beauty 
of their foliage; these three trees are the Hemlock from the high 
mountains of the Carolinas {Tsuga caroliniana) , the Spruce-tree of the 
Balkan Peninsula {Picea omorika) , and a Japanese Fir-tree, Abies horn- 
olepis (or brachyphylla) . The last is a tree of dense habit, dark green 
