best known species of the genus, already grows spontaneously in some of 
the eastern states, and seedlings of Rhamnus Frangula spring up so 
frequently in the Arboretum and grow so rapidly and vigorously that it is 
evidently entirely at home here. Rhamnus catharticus was probably much 
oftener planted in the United States a hundred years ago than it is now. 
New introductions have caused its value to be forgotten. This is unfor- 
tunate for this Buckthorn is a valuable shrub for our climate where it 
sometimes becomes a small tree at least thirty feet high. The flowers, 
like those of all Buckthorns, are inconspicuous but the leaves are bright 
and shining and remain on the branches after those of most shrubs have 
fallen, contrasting beautifully in the autumn with the black, shining 
fruits which make a fine display until late in the winter. This Buckthorn 
is one of the best hedge plants in this climate. Rhamnus catharticus is 
already out of flower and the fruit is formed, but Rhamnus Frangula 
is flowering and will continue to flower for a long time as the flowers open 
in succession so that green, red and black fruits appear together on the 
same branch, these being the colors the fruit assumes 'as it grow& and 
ripens. Rhamnus Frangula is a tall shrub with slender erect stems and 
branches and very lustrous leaves which, like those of the other species of 
the group, fall in the autumn without change of color. The Buckthorn 
Group is on the left-hand side of the Meadow Road where these species 
can be seen. Rhamnus Frangula is planted, too, in other parts of the 
Arboretum, and it can often be seen in the shrubberies of the Boston 
parks. 
On the cover of the June 15th issue of Country Life in America a 
water-color drawing of the Sargent Rose by Mr. George Walter Dawson 
of the University of Pennsylvania is reproduced. The Sargent Rose was 
raised at the Arboretum in 1903 and is the result of a cross between the 
Hybrid Perpetual Rose and a hybrid, Baroness Rothschild, made at the 
Arboretum by Mr. Dawson between Rosa Wichuraiana and the Crimson 
Rambler. The flowers are cup-shaped, pale clear pink and semi-double, 
that is there are two rows of petals, and they are produced in large clus- 
ters, each composed of from fifty to sixty flowers. The flowers open 
gradually and in succession, so that the plant is covered with flowers for 
several weeks. The Sargent Rose is one of the handsomest Roses that 
has been raised in the United States. The original plant, which is now 
about eight feet high and eight or nine feet through, is now in flower 
and can be seen in the nursery at Mr. Dawson’s house on Centre Street 
near the Centre Street entrance. This nursery can also be reached by a 
path leading from the right of the Bussey Hill Road above the Lilacs. 
An illustrated guide to the Arboretum containing a map showing the 
position of the different groups of plants has recently been published. It 
will be found useful to persons unfamiliar with the position of the differ- 
ent groups of plants. Copies of this guide can be obtained at the Admin- 
istration Building in the Arboretum, from the Secretary of the Massa- 
chusetts Horticultural Society, 300 Massachusetts Avenue, Boston, from 
The Houghton, Mifflin Company, 4 Park Street, Boston, and at the Old 
Corner Bookstore, Bromfield Street, Boston. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
