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Tibet, at altitudes of over eight thousand feet. This shows that this 
tree has a remarkable constitution, and suggests the possibility of 
crossing it with some of our cultivated Apples with the view of obtain- 
ing a race capable of producing fruit in warm climates like Florida and 
southern California. As an ornamental tree it is valuable for the late- 
ness of its abundant and fragrant flowers and handsome fruit which is 
oval, red or yellow, and from an inch to an inch and a half long. 
Fothergilla. This is a genus of shrubs related to the Witch Hazels. 
The small white flowers are produced in nearly round terminal clusters. 
The foliage has the general appearance of that of the Witch Hazel 
and in the autumn turns to brilliant shades of red and orange. The 
largest specimen in the Arboretum is a plant of F. major in the Hama- 
melis Group near the small pond at the junction of the Meadow and 
Bussey Hill Roads; and three species can be seen in the Shrub Collec- 
tion and on Azalea Path where there are a number of plants. First 
cultivated in England more than a century ago, Fothergilla seems to 
have disappeared from gardens until it was reintroduced by the Arbor- 
etum a few years ago. All the species are plants of much interest and 
great beauty but it is doubtful if any of them can now be found in any 
commercial nursery. 
Siberian Pea-trees. This is the popular name of the plants of the 
genus Caragana of the Pea Family. They are very hardy, free-flower- 
ing shrubs or small trees from Siberia and northern China, with showy 
yellow flowers which are often followed by conspicuous pod-like fruits. 
Several of these plants which are arranged in the Shrub Collection are 
now in flower. Less commonly cultivated, perhaps, than they were 
fifty years ago and not often seen in American gardens, the Siberian 
Pea-trees are well suited for the colder parts of the United States and 
for Canada. 
The Flowering Dogwood. This tree (Cornu s florida) is nowin flower 
and of unusual beauty this year. It is not native n the Arboretum 
but has been largely planted here and is now the most conspicuous 
plant, perhaps, in the roadside plantations. Comparatively rare in this 
latitude, the Flowering Dogwood is very abundant southward, and in 
early spring gives to the forest margins of the middle and southern 
states one of their greatest charms. The Flowering Dogwood of the 
east, beautiful as it is, is not so handsome as the species from the 
Pacific States, Comas Nuttallii , which is a tree sometimes sixty or 
seventy feet high with involucres to the flower-clusters nearly twice as 
wide as those of Cornus florida. Cornus Nuttallii grows in damp w T oods 
under the shade of coniferous trees and is difficult to keep alive outside 
its native forests. It has never succeeded in the Arboretum and ap- 
pears to have flowered in Europe in only a few gardens. The Japanese 
representative of this group, Cornus kousa, is hardy and flowers 
abundantly in eastern Massachusetts. It is a small tree which flowers 
later than Cornus Jlorida and differs from it in its smaller pointed floral 
bracts, and is chiefly valuable for prolonging the flowering time of 
these beautiful plants. 
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