group. Very generally and widely cultivated in Japanese gardens, 
Prunus subhirtella is not known anywhere in a wild state. The 
collection of Cherries is on the right-hand side of the road entering by 
the Forest Hills Gate. 
Forsythias. A year ago the flower-buds on many of these plants 
had been destroyed by the severe cold of the previous winter, now 
they are all blooming as freely as usual. The handsomest of these 
plants at this time is a hybrid between two of these species, Forsythia 
suspensa Fortunei and F. viridissima, known as F. intermedia. There 
are several forms of this hybrid. The one called F. intermedia prim- 
ulina, with pale canary yellow flowers, a seedling which sprang up 
spontaneously in the Arboretum a few years ago, is one of the most 
beautiful of these hybrid forms. F. europaea, a vigorous hardy plant 
with erect branches, is perhaps less beautiful in flower than the Chin- 
ese species but is interesting as an European representative of a genus 
otherwise confined to China and Korea. There is a collection of For- 
sythias in the Shrub Collection and a large mass of them at the lower 
end of the Bussey Hill Road. 
Azaleas. The first of these plants to flower is Rhododendron mucron- 
ulatum (all the Azaleas are now called Rhododendrons). It is a tall, 
perfectly hardy, erect shrub with erect slender branches. The flowers 
are rose color and appear before the leaves. It has been in the Arbore- 
tum for more than thirty years but has not before flowered so freely 
as it has this spring. There is a large group of these plants on the 
lower side of Azalea Path, and although the flowers are beginning to 
fade it is well worth an early visit. Another Azalea from northeastern 
Asia, Rhododendron dahuricxim, with rather smaller, darker colored 
flowers than the last to which it is closely related, has never flowered 
so well before in the Arboretum. There is a group of these plants 
on the upper side of Azalea Path. 
Automobiles are not admitted to the Arboretum, but visitors who 
desire carriages to meet them at the Forest Hills entrance can obtain 
them by telephoning to P. J. Brady, Jamaica 670, or to Malone & 
Keane, Jamaica 344. 
The subscription to these Bulletins is $1.00 per year, payable in 
advance. 
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 Arboretum. Copies 
of this guide can be obtained at the Administration Building in the 
Arboretum, from the Secretary of the Massachusetts Horticultural 
Society, 300 Massachusetts Avenue, Boston, from The Houghton, 
Mifflin Company, 4 Park Street, Boston, at the Old Corner Bookstore, 
Bromfield Street, Boston, and at the office of the Harvard Alumni Bul- 
letin, 50 State Street, Boston. Price, 30 cents. 
