produce such large and beautiful flowers. This inhabitant of the coast 
region of the southern United States is perfectly hardy in northern 
gardens. 
In the Shrub Collection the European Cytisus nigricans, with its 
erect racemes of bright yellow pea-shaped flowers, is now in bloom, 
and this little shrub is one of the best plants of its class which can be 
grown successfully in this climate. The latest flowering Bush Honey- 
suckles, the European Lonicera iberica, with pale yellow flowers, and 
L. involucrata, var. serotina from the Rocky Mountains, with its yel- 
low tubular corollas, are still in flower, although the fruits of some of 
the early-flowering plants in this group are already ripe, like the differ- 
ent forms of the blue-fruited L. coerulea and the red-fruited L. Alt- 
mannii from central Asia. From now until December there will be 
beautiful and often showy fruits on some of the Bush Honeysuckles. 
Conspicuous plants now in bloom are the Silky Cornel, Cornus Amo- 
mum, the last of the genus to flower, and Viburnum Canbyi, the 
latest species of this interesting genus. In cultivation this shrub grows 
to a large size, forming a broad, round-topped bush ten or twelve feet 
high and flowering freely every year. The fruit is larger and ripens 
later than that of the other blue-fruited species. Several species of 
Tamarisk are now in flower and can be seen in a bed by the path in 
the rear of the Linden Collection where this genus has been planted. 
The pure white fragrant flowers of Rhododendron ( Azalea ) viscosum are 
open; those of Magnolia glauca still fill the air with delicate perfume, 
and the flowers of Rhododendron maximum, the last of the evergreen- 
leaved Rhododendrons to bloom, can be seen at the base of Hemlock 
Hill. The Sumachs are beginning to open their flowers, and many 
different kinds of the Burning Bush (Evonymus) are in bloom opposite 
the group of Sumachs on the Meadow Road, among them the broad- 
leaved form of the evergreen Evonymus ( E . radicans var. vegetus ) is 
unusually full of flowers this year and therefore will be exceptionally 
beautiful in autumn when its fruit ripens. Attention is again called to 
this plant as the best of the various forms of this Japanese Evonymus, 
which is the only perfectly hardy evergreen vine which can be grown 
in this part of the country. 
There are still several interesting trees and shrubs to flower. Among 
them are the North American Sorrel-tree, Oxydendrum arboreum, and 
the North American Hercules' Club, Aralia spinosa. These two trees 
are among the Laurels at the base of Hemlock Hill. Other trees to 
flower are the Chinese Koelreuteria paniculata, with its great clusters 
of bright yellow flowers, Sophora japonica, Maackia amurensis, Aralia 
chinensis , and Acanthopanax ricinifolius, all natives of eastern Asia, 
and the last one of the rare trees of the Arboretum, where it is con- 
spicuous with its great leaves like those of some tree of the tropics 
and large clusters of small white flowers. The Yuccas, the lovely 
Clethra alnifolia of the Atlantic coast, and Panax sessilijlorus from the 
coast of northeastern Asia, are still to flower. The Chinquapin ( Cas - 
tanea pumila) is already covered with flowers, and these in a few days 
will be followed by those of the native Chestnut-tree. For many weeks 
to come, therefore, the lover of flowers can find much of interest in 
the Arboretum. 
These bulletins will now be discontinued until the autumn. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
