18 
C. siliqua strum, is not hardy in New England. There is also a white- 
flowered form of this tree. 
Malus Sargentii. Only about half the plants of this Japanese species 
are blooming in the Arboretum this year. This failure to flower is 
not a common occurrence, and this wide-spreading, Japanese shrub is 
an excellent plant for small gardens or to plant in front of a group of 
the larger growing Crabapples. It blooms later than the Asiatic 
species. The flowers, although smaller than those of the other species, 
are attractive because the petals, which are tinged with rose color be- 
fore the buds open, after opening are pale straw color, the large 
bright yellow anthers adding to the beauty of the flowers. The bright 
scarlet, comparatively large fruits of this shrub remain on the branches 
until spring but do not appear to be relished by birds. 
Malus Sieboldii. This Chinese and Japanese Crabapple is one of the 
last of the Asiatic species to flower in the Arboretum. Although the 
flowers are hardly more than three-quarters of an inch in diameter, 
the plants when in bloom are attractive, for like those of other Crab- 
apples the}’^ do not all open at once, and the dark rose-colored buds 
make a delightful contrast with the expanded petals which are pure 
white on the inner surface and faintly tinged with rose color on the 
outer surface, especially on the margins. The dark gray-green of the 
young leaves adds to the interest of these plants when they are in 
bloom. The form of this Crabapple on which this species was founded 
is a round-topped shrub three or four feet high and eight or ten feet 
broad with stout, rather drooping branches. There is a tree form 
(var. arborescens) with tall stems and long branches spreading horizon- 
tally. The two forms which were raised from seed sent to the Arbor- 
etum many j^ears ago from Pekin are in the old collection on the For- 
est Hills Road and in the collection at the base of Peter’s Hill, and 
they are both flowering w’ell this year. The fruit of this Crabapple is 
very small, and on some individuals it is red and on others yellow. 
Exochorda Giraldii VVilsonii. The Chinese Pearl Bush {Exochorda 
racemosa) has long been a familiar and much admired shrub in many 
American gardens on account of its showy racemes of large pure white 
flowers. Old specimens assume an open and not a very attractive habit, 
and lose much of their early beauty. The variety {E. Giraldii) which 
was discovered by Wilson in western China and named for him, although 
in its native country it is a wide-spreading shrub, in cultivation here 
grows like a tree with a single straight stem and comparatively short 
branches which form a narrow pyramidal head. The flowers are much 
larger than those of the old-fashioned Pearl Bush, and this new intro- 
duction promises to be a better garden plant. It is now well estab- 
lished in the Arboretum where several plants are now in flower, and 
in other Massachusetts gardens. The Chinese Exochorda is best known 
as E. grandijiora, but the older and correct name is E. racemosa. On 
Hickory Path, near Centre Street, E. macrantha, an interesting hybrid 
between the Chinese E. racemosa and E. Korolkowii from central Asia, 
