50 
Orange thrives, and rarely ascends to elevations of three thousand 
feet. It is a shrub five or six feet tall with erect stems, small, nar- 
row pointed leaves with only two or three pairs of prominent veins, 
small clusters of white flowers and black fruits. There is a good spec- 
imen of this plant among the Chinese shrubs on the southern slope of 
Bussey Hill which in a few days will be covered with flowers. Shrubs 
which flower here late in July are not very common and this Cornel 
promises to be a useful addition to the list. 
Late flowering Barberries. Three species of Berberis from western 
China are now in flower, B. aggregata, B. Prattii, and B. subcaiilia- 
lata. These plants will probably become popular for they are the latest 
of the Barberries to flower. They are all erect-growing, tall shrubs 
with small yellow flowers in drooping clusters which are followed by 
red fruits. There are plants in the Shrub Collection and with the 
Chinese shrubs on the southern slope of Bussey Hill. 
Hydrangea radiata. A form of Hydrangea arborescens (var. grandi- 
flora), with large globose heads of sterile flowers, has become immensely 
popular in this country since its discovery a few years ago in one of 
the western states, and it can now be seen in many suburban gardens. 
A much more beautiful American species, however, is Hydrangea rad- 
iata , which is now in flower in the Shrub Collection. It is a native of 
mountain slopes in North and South Carolina, and is a round-topped 
shrub with large leaves very dark green above and silvery white be- 
low, and broad heads of flowers surrounded by a ring of white neutral 
flowers. It is one of the handsomest of all the Hydrangeas w r hich are 
perfectly hardy in this climate, and although once a popular garden 
plant it is now rarely found in collections. 
Hydrangea paniculata. More conspicuous now in the collection is the 
early-flowering form of Hydrangea paniculata (var. praecox). The most 
generally planted form of Hydrangea paniculata is that in which all 
the flowers are sterile, known as Hydrangea paniculata grandiflora. 
This plant produces large clusters of white flowers which turn rose 
color in fading, and will not be in bloom for several weeks. The 
variety praecox, which is one of the forms of the wild plant, has ray 
flowers surrounding the clusters of sterile flowers. There are two or 
three forms of the variety praecox in the collection differing in the 
size of the flower-clusters and in the size of the ray flowers. The 
handsomest and earliest of these was raised from seeds collected by 
Professor Sargent in Hokkaido where it grows into a small tree some- 
times twenty or thirty feet tall. 
Colutea arborescens. This and related species are now among the 
most beautiful plants in the Shrub Collection as they are still covered 
with yellow flowers which are mixed with the large, inflated, rose-col- 
ored or pink pods to which these plants owe their common name of 
Bladder Sennas. 
Aesculus parviflora. The last of the Horsechestnuts to flower, 
Aesculus parviflora, will soon be in bloom. It is a tall, round-topped, 
shapely shrub well suited to plant in large masses or as a single spec- 
imen. In good soil and when uncrowded by other plants it soon spreads 
