Complimentary 
NEW SERIES VOL. I 
NO. II 
ARNOLD ARBORETUM 
HARVARD UNIVERSITY 
y ufcfK 
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BULLETIN 
OF 
POPULAR INFORMATION 
JAMAICA PLAIN, MASS. JULY 2, 1915 
Three Asiatic Poplars. Among the trees which have come from 
western Asia to the United States are three Poplars which give prom- 
ise of being valuable in this country. They are hardy, grow rapidly 
and seem to be less liable to suffer from borers than many other Pop- 
lar trees. The first of these trees, 
Populus Maximowiczii, is a native of eastern Siberia, Saghalin, and 
northern Japan. It is the largest tree of eastern Siberia, where it 
sometimes grows eighty feet high with a trunk three or four feet in 
diameter and a broad head of massive spreading branches, and in 
Japan it is only exceeded in size by the Cercidiphyllum. The trees in 
the Arboretum have been growing here several years and are twenty- 
five or thirty feet high, with smooth, pale brown stems and shapely 
heads. The leaves are broadest above the middle, very finely toothed, 
pale green and lustrous above, silvery white below, three or four 
inches long and two or two and a half inches wide. The fruit which 
is fully grown in May, unlike that of other Poplars, remains on the 
trees here until September without opening. Judging from the climate 
of the region where this Poplar grows naturally, it should be hardy 
in all the northern states and in a large part of Canada, and a valu- 
able shade tree in regions of extreme cold like northern Minnesota 
and the Dakotas where it is possible to grow successfully a compara- 
tively few trees of large size. In nurseries P. Maximowiczii is often 
confused with Populus suaveolens, another Siberian species, and it is 
sometimes called in the United States the “Japan Poplar.” It is one 
of the handsomest and most satisfactory trees in the Arboretum col- 
lection of Poplars. The second of these Asiatic Poplars, 
41 
