58 
the other species of Rhus on the left-hand side of the Meadow Road 
opposite the Euonymus Collection. Rhus javanica blooms at midsum- 
mer and the large terminal clusters of white flowers make it attract- 
ive at a season when few trees are in bloom. The bright yellow leaves 
of the Varnish or Lacquer- tree of China and Japan, Rhus verniciflua, 
in this group have also been conspicuous this year. In the nursery 
near the top of Peter’s Hill there are larger and better specimens of this 
tree which is as poisonous as our native so-called Poison Ivy and should 
be admired from a distance. The autumn change of color in the leaves 
of the trees and shrubs of eastern Asia usually occurs three or four 
weeks later than it does in those of the allied eastern American 
species. These two species of Rhus are exceptions to this general 
statement, and other conspicuous exceptions are Acer ginnala and 
Evonymus alatus. The former is a small tree or treelike shrub with 
deeply divided leaves and small compact clusters of flowers which are 
exceptionally fragrant for Maple flowers. The leaves of no other 
plant in the Arboretum turn in the autumn more brilliant scarlet and 
for this reason, if for no other, this Maple deserves a place in north- 
ern gardens. It is among the first of all Maples to show the autumn 
change of color and the leaves have now nearly all fallen. Acer gin- 
nala is common in eastern Siberia and was one of the first Asiatic 
plants introduced into the Arboretum; it has proved perfectly hardy 
in northern New England and as far northward as Ottawa, Ontario. 
Evonymus alatus, which is a native of Japan and northern and cen- 
tral China, is a vigorous great shrub which, when sufficient space is 
allowed it, grows as broad or broader than high with its lower branches 
resting on the ground. The corky wings on the small branches to 
which it owes its name are interesting, but the flowers and fruit are 
not conspicuous; the leaves are smaller than those of many of the 
species, and the real value of the plant is found in their autumn color 
which is deep rose and unlike that of any other plant in the Arbore- 
tum. The autumn change of color comes early and the leaves are 
already falling, but while it lasts it is so beautiful that this Burning 
Bush deserves a place in northern gardens. It appears to best advan- 
tage when planted by itself that the branches may have sufficient room 
in which to spread widely, for when crowded by other shrubs in mixed 
plantations it loses its beauty of habit. There is a large specimen in 
the Evonymus Group on the right-hand side of the Meadow Road, and 
there is another in the grass border on the Bussey Hill Road above 
the Lilacs. 
Crataegus arkansana. This Hawthorn is one of the Molles Group of 
species which all have large flowers which appear with or before the 
unfolding of the leaves, and large, sometimes edible red or rarely yel- 
low fruit. The fruit of some of the species of this group, like C. mollis 
and C. Amoldiana, ripens early and has already disappeared, but that 
of C. arkansana does not become fully ripe until November, so that 
in late October this is one of the handsomest species for the leaves 
are still fresh and green, and add to the brilliancy of the large and 
abundant fruits. The largest plant in the Arboretum is on the left- 
hand side of the South Street entrance outside the gate. There is 
