22 
are as green as they were in October and the flower-buds have not 
been injured. It is a dwarf plant rarely growing to the height of three 
feet but the branches are wide-spreading and form a broad, compact, 
round-topped head. Little appears to be known of the history of this 
plant; it is evidently a hybrid and R. caucasicum is no doubt one of 
the parents. Judging by the leaves, R. catawhiense, or one of its hy- 
brids, may be the other parent. The French name suggests that it 
was raised in France as does the name of the raiser, Oudieu, given 
in a recent English work on Rhododendrons. The Arboretum will be 
glad of information about the origin and parentage of this plant. 
Whatever these may have been Boule de Neige seems one of the har- 
diest Rhododendrons which can be grown successfully in this climate. 
Another dwarf Rhododendron, Mont Blanc, a variety or hybrid of R. 
caucasicum, flowered a few days earlier than Boule de Neige. It is a 
dwarfer plant and the flowers are rose color when they first open but 
soon become pure white. This is a plant which has bloomed in the 
Arboretum for several years and has never been injured. The history 
of its parentage and origin are not recorded. A hybrid, R. caucasi- 
cum, with rose-colored flowers, sold in nurseries as R. Jacksonii al- 
though that name properly belongs to another hybrid, has lost a good 
many leaves and some of the flower-buds. R. carolinianum is unin- 
jured and has been flowering for the past ten days. The fact that it 
has been able to come through the past winter without losing a leaf 
or bud speaks well for the ability of this little southern plant to adapt 
itself to the New England climate. The form usually cultivated has 
pale rose-pink flowers, but the form with pure white flowers is the 
more common in the mountain forests of the Carolinas which is the 
home of this species. R. Smirnowii, uninjured by the winter, is again 
in bloom. This inhabitant of the Caucasus is a large shrub with pale 
gray-green leaves coated below with a thick mat of pale felt and large 
pink or rose-colored flowers. This plant is so hardy that it is not im- 
probable that a new race of Rhododendrons adapted to this climate 
can be obtained by crossing it with R. catawbiense, R. maximum and 
other hardy species. The felt on the lower surface of the leaves pro- 
tects them from the attacks of the lace-wing fly which has been so 
destructive to Rhododendrons here in recent years, but unfortunately 
the leaves of the hybrids of R. Smirnowii which have been raised have 
entirely lost this protection. 
Cotoneaster hupehensis. The plants of this shrub in the Shrub Col- 
lection and on the southern slope of Bussey Hill are again covered 
with flowers. It is a broad tall shrub with wide-spreading, arching 
branches and small clusters of white flowers which stand up well above 
the leaves. The fruit is scarlet and lustrous. This species and the 
two mentioned in the fourth number of these Bulletins, C. multijlora 
calocarpa and C. racemiflora soongorica are the handsomest of the 
Cotoneasters discovered by Wilson in western China and perhaps the 
most valuable shrubs for the northern states which have been intro- 
duced by the Arboretum in recent years. Cotoneaster divaricata and 
C. nitens are both covered with their small pink flowers. The lustrous 
leaves of these plants are attractive through the season. 
