40 
grown is yellow, then pink, and finally blue-black, the three colors often 
appearing at the same time in the same cluster. The fruit of Viburnum 
cassinoides is larger than the bright blue fruit of the other summer- 
flowering species, V. dentotum, V. venosum and V. Canbyi which bloom 
in the order in which they are mentioned here. They are large round- 
topped bushes with coarsely toothed leaves and large clusters of white 
flowers; they are all good garden plants and respond to generous treat- 
ment with more vigorous growth, a better habit and handsomer foliage. 
There is a large collection of deciduous-leaved Viburnums in the Arbor- 
etum and there is now a good opportunity here to judge the compara- 
tive values of the plants from different countries, and this comparison 
shows that the flora of eastern North America contains more handsome 
garden plants in this genus than all the rest of the world. In Japan 
there are species like Viburnum tomentosum, V. Sieboldii and V. dil- 
atatum which are beautiful garden plants, and the European Travel- 
ler’s Tree, V. lantana, is one of the handsomest and most distinct of 
the early-flowering Viburnums which can be successfully grown here. 
In claiming the superiority of the American species for American gar- 
dens it must be remembered that none of these species have red fruit, 
which is produced by several of the eastern Asiatic species. The most 
successful of the red-fruited species in the Arboretum have been V. 
dilatatum and V. Wrightii. These should find a place in American 
collections, especially the former which is here a hardy, free-flowering 
plant of compact habit, which has few rivals in the beauty of its bril- 
liant and abundant bright red fruit. 
Cornus kousa. The flower-buds of the native Cornus florida were 
practically all killed by the cold of 'the past winter except those on 
lower branches which had been buried in snow. It is interesting to 
find, therefore, that the flower-buds of the related species from eastern 
Asia, Cornus kousa, were not injured and that the Arboretum plants 
have not before been more fully covered with flowers. The form from 
western China discovered by Wilson, which has before bloomed only 
sparsely in the Arboretum, is this year white with the bracts of the 
flower-clusters. The flower-bracts of the Chinese plant are broader 
and closer together than those of the Japanese plant and it promises to 
be more valuable here for garden and park decoration. The flower- 
bracts, however, of both forms of the Asiatic plant are pointed, mak- 
ing a star-like inflorescence, and are much narrower than those of Cor- 
nus fiorida which is still the handsomest of the “Flowering Dogwoods” 
which can be grown in Massachusetts. 
Rhododendron (Azalea) calendulaceum. The plants of the flame-col- 
ored Appalachian Azalea on Azalea Path furnish this week the most 
brilliant display in the Arboretnm. No other Azalea which can grow 
in the open ground in this climate equals this in beauty with the ex- 
ception, perhaps, of the pink-flowered R. Vaseyi which blooms before 
its leaves appear. On R. calendulaceum and the other late-blooming 
American species a beauty of the flowers due to their contrast with the 
well grown leaves is not found on R. Vaseyi or on any of the Asiatic 
Azaleas which can be grown in the northern states. 
Philadelphus splendens was inadvertently omitted from the list of 
Arboretum hybrids printed on page 31 of these Bulletins for the cur- 
rent year. 
