6 
Boston. It is a vigorous plant five or six feet high, and when fully 
grown often broader than tall. The flowers open from pink buds as 
the leaves unfold and their bright red stalk and calyx make a hand- 
some contrast with the white petals often blotched with rose color. 
The small scarlet lustrous fruit which ripens in June and is covered 
with short hairs is attracting the attention of pomologists in regions of 
intense cold in the interior of this continent where Prunus tomentosa 
has proved to be hardy. Crossed with Prunus Cerasus, if such a cross 
can be made, it might produce a race of garden Cherries which would 
probably be hardy further north than it is possible to cultivate success- 
fully any of the varieties of that species. A form of Prunus tomen- 
tosa (var. endotricha) discovered by Wilson in western China flowers a 
few days later than the species from which it chiefly differs in the 
absence of hairs from the fruit. An Almond from northern China, 
Prunus triloba, blooms with or a little later than Prunus tomentosa. 
It is a tall shrub ,of open irregular habit, and its only beauty is in its 
flowers which are purest pink in color. No other plant in the Arbore- 
tum produces flowers more delicately beautiful in color, but although 
it has been flowering here now for nearly thirty years it is still rare 
in American gardens. The less beautiful double-flowered form (var. 
plena) is, however, a better known and more popular garden plant in 
this country. A single plant {Prunus Arnoldiana) of what is evidently 
a natural hybrid between Prunus triloba and P. tomentosa appeared in 
the Arboretum a few years ago ampng seedlings of the former. It is 
a vigorous upright growing shrub with a single stem, handsome white 
flowers which appear as the leaves unfold, cherry-like fruit which rarely 
develops, and leaves intermediate between those of its supposed parents. 
The large trees of the Sargent Cherry, Prunus serruluta var. sacha- 
liuensis, have lost this year some of their flower-buds especially from 
lower branches but are nevertheless well covered with their pink and 
rose-colored flowers. The flowers are short-lived, but their abundance 
and beauty, the hardiness of the tree which has not yet been attacked 
by any disease, the beauty of its ample dark green leaves brilliantly 
colored in the autumn and its bright and lustrous bark make this the 
handsomest Cherry-tree of large size which can be successfully grown 
in this climate. In recent years it has been difficult to obtain from 
Japan seeds of this northern variety of Prunus serrulata for the large 
trees have been generally cut in Hokkaido for lumber; and the plants 
now in the United States have been raised from the seeds produced by 
the Arboretum trees. A number of these seedling trees are beginning 
to flower in different parts of the country and will in the course of a 
few years be producing crops of fruit. This ripens in the Arboretum 
in June; and everyone with fruit-bearing trees of this Cherry should 
protect the fruit from birds and see that the stones are planted, for 
the Sargent Cherry is one of the handsomest trees which can be used 
successfully for the decoration of northern gardens and supplies the 
best stock on which to gi’aft or bud many of the double-flowered Jap- 
anese Cherries, the handsomest and hardiest of which are forms of 
Prunus serrulata and its varieties. The Spring Cherry of the Japan- 
ese {Prunus subhirte’la), the most delightful and floriferous, travellers 
