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in the shape of the fewer-flowered flower-clusters, and in the presence 
of gland-tipped prickles on the stalks of the flowers and on the fruit. 
The flowers in size and color resemble those of R. caudata. This Rose 
was first sent to the Arboretum by Monsieur Maurice de Vilmorin and 
it has flowered here now for several years. The plants now in bloom 
were raised from seeds collected by Wilson in western China and can 
be seen in the Shrub Collection and on Bussey Hill. 
Rosa multibracteata. This is a small plant with slender stems cov- 
ered with numerous small spines, small leaves and innumerable small, 
pink, solitary flowers which are followed by comparatively large red 
fruits covered with glandular prickles. This very hardy little Rose 
was discovered by Wilson in the extreme western part of China, and 
is flowering this year for the first time in the Arboretum. It is one 
of the last of the Chinese Roses to open its flower-buds. 
Rosa Jackii. This beautiful Rose was introduced into the Arboretum 
from Korea several years ago by Mr. Jack, and when it flowered was 
named for him. At about the same time it was named in England 
Rosa Bakeri and R. Kelleri, names which cannot be used for it, how- 
ever, as they had previously been given to other Roses. It is one of 
the Multiflorae Roses with long stems which lie flat on the ground, lus- 
trous foliage, and pure white flowers two inches or more in diameter, 
in wide, many-flowered clusters. The flowers are larger than those of 
the Japanese Rosa multiflora and it blooms much later than that 
species. This Rose is perfectly hardy and a first-rate garden plant. 
The hybridizer ought to be able to find in it a good subject from which 
to raise a race of hardy, late-flowering Rambler Roses. It is now in 
flower in the Shrub Collection where it is labeled R. Kelleri. 
Sambucus canadensis. As the flowers of the Laurel ( Kalmia latifo- 
lia) begin to fade those on the native Elder (Sambucus canadensis) 
open. This is the last of the native shrubs to make a conspicuous 
show of flowers in the Arboretum. It is particularly beautiful this 
year along Bussey Brook in the valley at the northern base of Hem- 
lock Hill where many plants have grown from seeds sown by birds. 
It is conspicuous, too, about the ponds near the junction of the Meadow 
and the Forest Hills Roads. Few native shrubs make a greater show 
than this Elder with its broad heads of white flowers and lustrous 
black fruits. Growing with it in the Shrub Collection is a form with 
leaflets deeply divided into narrow segments (var. acutiloba). There is 
also here a form with dull yellow fruit (var. chlorocarpa), and a plant 
which originated a few years ago in a European nursery (var. maxima) 
with flower-clusters three times as large as those of the wild plant, 
and such large and heavy bunches of fruit that the branches are hardly 
able to support them. This form flowers ten or twelve days later than 
the common wild plant. 
Rhododendron arborescens. Before the last flowers of the Yellow 
Azalea of the southern Appalachian Mountains ( Rhododendron calendu- 
laceum) have fallen those of another Appalachian species (R. arbores- 
cens) open. This is one of the most beautiful of all the American 
Azaleas, with large fragrant flowers which, pale rose color in the bud, 
are pure white as the corolla expands. The long bright red filaments 
and styles add to the beauty of the flowers. It is a shrub sometimes 
