20 
Other Crab-apples to which special attention is called are: — Malus 
Halliana, var. Parkmanii, the double-flowered form of a Chinese tree^ 
long cultivated by the Japanese and introduced into this country from 
Japan more than forty years ago. The bright rose-colored flowers hang 
on long slender stems and differ in color from those of any other Crab- 
apple; Malus Sargentii, a shrub from northern Japan with wide-spread- 
ing branches, pure white flowers with bright yellow anthers, and scarlet 
fruit which remains on the branches until spring and appears to be 
unpalatable to birds; M. Sieholdii, a Japanese plant better known per- 
haps under the incorrect name of M. toringo^ and the last of the Asiatic 
species in the collection to bloom. There are both shrubby and arbor- 
escent forms of this plant which has small nearly white flowers pro- 
duced in immense quantities and minute fruit which is bright red on 
some individuals and yellow on others. The variety callicarpa of this 
species is one of the handsomest of the Crab-apples in the collection 
both in spring and autumn. It is a broad tree-like shrub or small tree 
with slightly lobed leaves, pink and w’hite flowers an inch in diameter, 
and brilliant scarlet, lustrous fruits which are half an inch in diameter 
and are more beautiful perhaps than those of any other Crab-apple. 
This beautiful plant is little known in gardens and was raised in the 
Arboretum from seed presented in 1890 by Dr. William Sturgis Bigelow, 
of Boston. It is impossible in one of these bulletins to more than men- 
tion a few of the most important plants in this group, but something 
will be said of others as they begin to flower. The old Crab-apple Col- 
lection is on the left-hand side of the Forest Hills Road next to the 
group of wild Pear-trees, and a much larger and more complete col- 
lection is at the eastern base of Peter’s Hill. 
Rhododendron (Azalea) poukhanense. Another year adds to the good 
opinion w’e have of this plant at the Arboretum, for New England 
winters have no bad effects on it and it is blooming on Azalea Path 
more freely perhaps than ever this spring. This low, compact, round- 
topped Korean shrub is well suited for the decoration of the rock garden 
and to use in small beds or borders. The large rose-pink flowers are 
unusually fragrant among those of plants of this class. 
Pyrus Calleryana. This Pear-tree, which is widely distributed in 
central China, is flowering well for the first time in the Arboretum, 
and can be seen in the new collection of Chinese trees of the Rose 
Family on the southern slope of Bussey Hill. The flowers are smaller 
than those of Pyrus Bretschneideri and P. ovoidea, Chinese Pear-trees 
now in flower in the old Pear Group on the Forest Hills Road, and the 
small fruit is of no value. This may.be a really valuable tree, how- 
ever, as some American Pomologists are of the opinion that it may 
prove a blight resisting stock on which to graft garden varieties of 
the Pear. As the Arboretum plants are the only ones in America large 
enough to bloom it will require several years to obtain plants enough 
thoroughly to test its value for this purpose. 
