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Rhododendron caucasicum is a dwarf, white-flowered species which 
is still little known in this country. The variety called Boule de Neige 
is much used in Europe as a stock plant for its varieties and hybrids, 
and is growing in the Arboretum. Another variety or hybrid about 
which we practically know nothing beyond the fact that it is hardy 
and one of the most beautiful of all dwarf Rhododendrons is called 
Mont Blanc. The flowers of this are pink when they open but soon 
turn pure white. In 1908 the Arboretum imported from T. J. Seidel, 
the well known nurseryman at Schwepnitz, near Dresden, a set of 
Rhododendrons which are the most promising hybrids which have ever 
been in the Arboretum where practically nothing is known about their 
origin except that they show evidences of the blood of R. caucasicum. 
They are dwarf compact plants which bloom every year a week or ten 
days earlier than the Catawbiense Hybrids and are perfectly hardy. 
No indication of their parentage is given in the names which are: 
Adalbert, Adam, Alarich, Albert, Annedore, Arno, Attila, August, 
Anton, Bella, Bismarck, Boule de Neige, Calliope, Daisy, Desiderius, 
Diana, Donar, Echse, Eli, Eva, Fee and Viola. We do not know of 
any plants under these names except those in the Arboretum, and an 
effort will be made to find out from the raiser their parentage. Al- 
though much smaller both in the size of the flower-clusters and that 
of the plant, they are much more satisfactory in this climate than any 
of the Catawbiense Hybrids. Unfortunately they can no longer be 
imported from Europe, but it may be possible to obtain stock on which 
they can be propagated, and of course good varieties may be obtained 
from seeds. On the whole this race is the most promising for New 
England and best worth the attention of growers. Many of the vari- 
eties are still in flower and others are fading. 
Lonicera Maximowiczii var. sachalinensis. Although this shrub has 
been known to science for a number of years, it was introduced into 
cultivation by Wilson who collected seeds at the base of the Diamond 
Mountains in northern Korea in August, 1917, where it grows as a 
shrub four or five feet high with erect branches. It is distinguished 
from the better known Lonicera Maximowiczii, which is widely dis- 
tributed through northeastern Asia and has been an inhabitant of the 
Arboretum for many years, by its leaves which are bright red as they 
unfold and glaucous and glabrous on the lower surface. Last year it 
had a few flowers but this year the plant in the Shrub Collection is 
covered with its scarlet, long-stalked flowers which will be followed 
by red fruit. This as it is growing this year is one of the handsomest 
of the new introductions and a plant which should be known to the 
lovers of beautiful shrubs. 
Lonicera Maackii, which is a native of northern China, is covered 
just now with its large white flowers, and in bloom is a handsomer 
plant than the variety podocarpa discovered by Wilson in western 
China. This is almost a tree with small white flowers but brilliant red 
fruit which ripens while the leaves are still green in the autumn, the 
green leaves making a beautiful contrast with the fruit, and for autumn 
decoration make it one of the most desirable of all fruit-bearing small 
trees or shrubs. The largest plant in the collection is among the Chi- 
nese plants on the southern slope of Bussey Hill. 
