double-flowered form of M. ioensis, known as the Bechtel Crab. This 
tree has double pale pink flowers which look like small clustered Roses, 
and attract so much attention that the ground around the trees is trodden 
hard every day by visitors who wish to examine them at close range. 
There are two trees of the Bechtel Crab opposite the end of the Meadow 
Road. 
The earliest of the American Hawthorns to flower in the Arbore- 
tum this year is Crataegus Arnoldiana. This is one of the large- 
leaved, large-flowered, and large-fruited species, and even in winter is 
easily recognized by its numerous thorns and by the zigzag manner in 
which its erect branches grow. The flowers open as the leaves expand 
and the brilliant scarlet fruit ripens toward the end of August and 
then soon falls. The early ripening of the fruit makes this tree valu- 
able because showy fruits are not common here in summer. C. Arnold- 
iana grows naturally on a wooded bank in the Arboretum and on the 
Mystic River in West Medford, Massachusetts. When botanists called 
all American Thorns with red fruits C. coccinea or varieties of that 
species C. Arnoldiana was included. There are a number of large 
plants in the shrubbery on the right-hand side of the Meadow Road, 
between its junction with the Bussey Hill Road and the Centre Street 
Gate. There is a plant, too, in the collection of Crataegus between the 
Shrub Collection and the Parkway, and there are a number of others 
on the right-hand side of the Meadow Road in front of the group of 
White Oaks. These trees will be in flower next week. 
The earliest flowering plants of Rhododendron (. Azalea ) Kaempferi are 
beginning to show the color of their flowers. There are two large groups 
of these plants in the Arboretum, one on the left-hand side of Azalea 
Path and the other on Hemlock Hill Road where they are planted in a 
long narrow belt between the Hemlocks and the Laurels. The plants on 
Azalea Path being exposed to the sun flower earlier and fade quickly as 
the delicate flowersare unable'long to resist our sun. This handsome plant 
is a native of the high mountains of Japan and was first cultivated in the 
Arboretum where it was raised from seeds collected in 1902 by Professor 
Sargent. On Azalea Path many of the plants will soon be in full flower, 
but those in the shade of the Hemlocks will not be at their best probably 
for a couple of weeks, but when their flowers do open here they will fur- 
nish one of the great sights of the Arboretum year. 
Viburnum Carlesii , a native of Korea, is flowering in the Arboretum 
for the first time. It appears to be very hardy and promises to be a first- 
rate ornamental plant here. The flowers are produced in compact clus- 
ters and are very fragrant. The open flower is pure white but the bud 
is pink, and as all the flowers do not open at the same time the contrast 
between the pink buds and the white flowers adds to the beauty of the 
cluster. There are small plants of this species in the Viburnum group on 
the right-hand side of the Bussey Hill Road near the nursery. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
