BULLETIN NO. 19. 
In the last issue of these bulletins something was said of the effects of 
the winter on a few of the new Chinese trees in the Arboretum. The 
number of new Chinese shrubs which promise to be hardy in this climate 
is naturally much larger than the number of trees. We can speak, how- 
ever, only of a few of these now. Of Lilacs Wilson found eleven species 
in China. Nearly all of these were discovered by him and most of them 
are now growing in the Arboretum where three species have been suffi- 
ciently tested to show that they will be hardy here. These are Syringa 
pinnatifolia, S. Komarowii and S. Wilscnii. The flowers and flower- 
clusters of the first are small and not conspicuous, but the deeply divided 
leaves are unusual among Lilacs and form the chief interest in this plant. 
The others are large shrubs related to S. villosa with handsome foliage 
and flowers. More interesting, although not yet fully teEted for hardi- 
ness, are S. reflexa, with long pendulous flower-clusters, thus differing 
from all the other known Lilacs, and & Sargentiana with long acuminate 
leaves and shorter nodding not pendulous flower-clusters. 
The genus Cotoneaster, which is valued chiefly for its black or red, 
often long-persistent fruits, has been poorly represented in our gardens 
as few of the species previously known have proved hardy here. Wilson, 
however, found an unexpectedly large number of new species of Cotcne- 
aster in western China and at least a dozen of these have passed through 
the winter without injury and promise to become valuable garden plants 
here. Among these may be mentioned C. Dielsiana, with weeping whip- 
like branches and small red fruits persistent late into the winter, C. di- 
varicata with dark red fruits, C. foveolata with large leaves which turn 
in the autumn to brilliant shades of orange and crimson and black fruit, 
C. moupinensis also with black fruit, a plant remarkable in the brilliant 
colors the leaves assume here in the autumn, and C. hupehensis, a strong- 
growing, shrubby black-fruited species with graceful spreading branches, 
ornamental white flowers and crimson globose fruit. 
Among the new Spiraeas introduced by Wilson are three species which 
are now known to be perfectly hardy and to be among the most ornamen- 
tal of all the numerous species and hybrids of this genus. These are 
S. Henryi, S. Wilsonii , and S. Veitchii. 
The Chinese Witch Hazel, Hamamelis mollis , a common shrub of the 
central provinces, has now lived unhurt in the Arboretum for two years. 
It is one of the late winter or early spring-flowering species and its flow- 
ers are said to be more beautiful than those of the other Witch Hazels. 
Several of the Chinese Hydrangeas are uninjured by the winter. Among 
these may be mentioned H. xanthourea and its several varieties, all 
handsome shrubs with large corymbs of flowers. In Exochorda Giraldii 
New England gardens have a new and perfectly hardy plant of first-rate 
importance. It grows to a height of twelve feet or more and produces 
larger and handsomer flowers than the well-known Pearl Bush of gardens, 
Exochorda grandijlora. 
Of the beautiful genus Abelia we have before been able to cultivate 
only the hybrid A. grandiflora, so it is particularly gratifying that the 
large-flowered, strong-growing A. Engleriana proves to be hardy here. 
It is of interest, too, that the new monotypic genus Kolkwitzia flourishes 
here. It is a shrub from four to six feet high with large terminal pan- 
