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COMPLIMENTARY 
NEW SERIES VOL. IX 
NO. 1 
ARNOLD ARBORETUM 
BULLETIN 
OF 
POPULAR INFORMATION 
JAMAICA PLAIN. MASS. JULY 19. 1923 
Summer Flowering Trees. After the flowers of the Linden trees 
have mostly passed those of a few other trees add to the interest of 
the Arboretum in the last weeks of July and in August. 
Koelreuteria paniculata is the first of these summer-flowering trees 
to bloom. It is a round-topped tree from 30 to 40 feet high with long 
compound dark green leaves and great erect clusters of golden yellow 
flowers which are followed by bladder-like pale fruits. This tree, which 
is a native of northern China and an old inhabitant of American gar¬ 
dens, is quite hardy in eastern Massachusetts, but has been more often 
planted in the Middle States than in New England. In American trade 
catalogues it usually appears as “the Japanese Lacquer tree” although 
it is not a Japanese tree and does not yield lacquer or anything else 
but beauty. The trees in the Arboretum are on the right hand side 
of the Meadow Road. There is a handsome specimen near the north¬ 
west corner of the Public Garden in Boston. 
Maackias are small summer flowering trees of the Pea-family with 
short erect spikes of small white flowers. The flowers of the best 
known of these trees, M. amurensis, from eastern Siberia have already 
faded but the variety Buergeri from northern Japan differing in the 
presence of a coat of soft down on the lower surface of the leaves, 
flowers a week or ten days later than the Siberian tree and is now in 
bloom. What promises to be a handsomer tree here than either of these 
is the still little known species from western China, M. chinensis, which 
first flowered in the Arboretum five years ago when it was called M. 
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