48 
grows only from the southern side of Cape Cod to New Jersey. Its 
flowers are followed by those of V. Canbyi which is the largest and 
handsomest of this group of Viburnums, and one of the handsomest 
of the summer-flowering shrubs in the Arboretum, where it is repre- 
sented by round-topped plants some twelve feet high and broad. By 
some botanists this shrub is considered a variety of V. venosum which 
it resembles, but the leaves and flower-clusters are larger; it blooms 
ten or twelve days later, and the flowers and fruits are larger. Its 
home, too, is not on the seashore but in northern Delaware and the 
adjacent parts of Pennsylvania, and in central Indiana. This Viburnum 
reproduces itself from seeds and there is therefore no reason why it 
should have remained so rare in gardens. 
Zenobia pulverulenta has not before been so thickly covered with 
flowers and this week has been the most beautiful shrub in the Arbor- 
etum. Zenobia is related to the Andromedas and is chiefly distinguished 
by its open campanulate flowers and four-awned anthers. The leaves 
are thickly covered with a glaucous bloom, and the ivory white flowers, 
which are about half an inch long and broad, are borne on slender 
arching stems in axillary clusters forming long terminal racemes on the 
upper part of the branches of the previous year. There is a form of 
this shrub (var. nitidu) with leaves green on the two surfaces. Zenobia 
is a southern genus with one species, and the fact that it is hardy in 
New England shows that only experiment will show whether a plant 
is hardy in any given locality remote from its natural habitat. The green- 
leafed variety grows in countless thousands along the borders of the 
great swamp across the river from New Berne on the coast of North 
Carolina. The white-leaved form, which was found by William Bartram 
on the lower Cape Fear River in North Carolina, appears to be less 
common and apparently has not been collected in recent years; that is 
the two forms of this plant grow in a region which could not be ex- 
pected to produce plants hardy in Massachusetts. 
Evonymus radicans is the only evergreen climbing plant really hardy 
in this climate which can attach itself firmly to stone, brick or concrete 
walls. There are a number of varieties of this variable plant in culti- 
vation, and the handsomest of them is the broad-leafed form from north- 
ern Japan, known as var. vegetus. This plant can grow in Massachu- 
setts to the eaves of a tall house and completely clothe its walls with a 
cover which grows thicker by an annual shortening of the branches, or 
if a wall is not provided for it to cling to it will grow as a low round- 
topped dense shrub. Like the other forms of the species it can also be 
used to cover the ground under trees and shrubs, but as a ground cover 
it is improved by occasional clipping. This variety vegetus is now cov- 
ered with its small yellow-green flowers which will be followed by abund- 
ant pink fruit, which adds greatly to the decorative value of this vari- 
ety which is the only form of E. radicans which has flowered in the 
Arboretum. The extreme cold of two recent winters injured the leaves 
on many plants of this var. vegetus in eastern Massachusetts, but the 
wood was not hurt and the branches were soon covered with a new 
crop of leaves. 
