grafts taken from the old trees in the Harvard Botanic Garden at 
Cambridge where they were probably planted soon after the establish- 
ment of the Garden. This tree usually bears a second crop of flowers 
during the summer but does not produce fruit, so that it can be propa- 
gated only by grafts and therefore remains extremely rare in cultivation. 
Viburnum prunifolium is in flower and can be seen on the right-hand 
side of the Bussey Hill Road opposite the Lilacs and at several points 
on the Valley Road. It is one of the three arborescent Viburnums of 
the United States and is a small tree with spreading branches and com- 
pact clusters of pure white flowers which are followed by blue-black 
fruit. It is one of the handsomest of the American Viburnums and is 
too rarely found in gardens. 
On the right-hand side of the Meadow Road there is a fine group of 
the northern pink-flowered Rhododendron ( Azalea ) canescens in flower 
and this plant can be seen on Azalea Path and in some of the other plan- 
tations. It is one of the earliest of the eastern American Azaleas to 
flower and during the next six weeks other species will bloom in the 
Arboretum where they are much hardier and in every way more 
satisfactory than the so-called Ghent Azaleas which are hybrids too 
often weakened by crosses with the tender yellow Azalea of the Cauca- 
sus or with the short-lived Japanese A. mollis. For American gardens 
American Azaleas, though not often cultivated, have proved themselves 
more satisfactory than any of the hybrids in part raised from them. 
The pale pink buds of the opening flowers of the hybrid Spiraea 
nudijlora in the Shrub Collection make this plant conspicuous at this 
time among the large number of species and hybrids of this genus. 
Of the immense tropical and subtropical genus Symplocos only one 
species is hardy in New England. This is the Japanese S. crataegoides y 
a large shrub with clusters of small white flowers just now opening and 
bright blue fruits which make this plant particularly attractive in the 
autumn. It is in the Shrub Collection and there are large specimens in 
the grass border between the drive and the walk on the left-hand side 
of the Bussey Hill Road above the LilacB. 
Vaccinium corymbosum , the High-bush Blueberry of New England 
swamps, has been largely planted in different parts of the Arboretum 
and is now covered with its white bell-shaped flowers. This is one of 
the most beautiful shrubs of eastern North America. The habit is 
good, the flowers and fruit are beautiful, and no other plant has more 
splendid autumn color. 
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, at the Old Cor- 
ner Bookstore, Bromfield Street, Boston, and at the office of the Harvard 
Alumni Bulletin, 50 State Street, Boston. Price, 30 cents. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
