tinged with rose was found near Fall River, Massachusetts, a few 
years ago and has been introduced into the Arboretum. Another spe- 
cies, a native of Florida, C. tomentosa, has proved hardy in the Arbor- 
etum, and is valuable as it flowers two or three weeks later than the 
northern Pepperbush from which it chiefly differs in the covering of 
white hairs on the lower surface of the leaves. The third American 
species, C. acuminata , an inhabitant of the forests of the southern 
Appalachian Mountains, has dull green leaves and drooping clusters of 
yellowish white flowers, and is a much less desirable garden plant. It 
can be seen with the others in the Shrub Collection and on the right- 
hand side of the Meadow Road near the Phellodendron Group. The 
Japanese species, C. canescens, lives in the Arboretum but has not 
proved very hardy here and has not flowered, although it has been 
more successful in other Massachusetts gardens where it produces freely 
its beautiful fragrant flowers. 
Only a few forms of the large genus Yucca, which has its headquar- 
ters in the southwestern part of the United States, in Mexico and in 
Central America, are hardy in the Arboretum where they can be seen 
in the Shrub Collection. The common Yucca of American gardens is 
Y. flaccida, with thin reflexed leaves gradually narrowed from below the 
middle to the apex and separating on the margins into straight thin 
threads. In gardens, however, it generally appears under the name of 
Y. filamentosa, a species with thicker and more rigid leaves usually 
broadest above the middle, and separating on the margins into coarser 
curled threads. Y. flaccida is a native of the southern Appalachian 
foothill region and is probably the hardiest of all the Yuccas. It is now 
in full flower, as well as the form with leaves striped with yellow (var. 
lineata) which is usually found in gardens under the name of Y. filamen- 
tosa variegata. A fine and vigorous form of Y. flaccida from Stone 
Mountain, Georgia, (var. patens) is also in flower. There are also in the 
collection the true F. filamentosa of the coast plains of the southeastern 
United States and its variety concava , found from the coast of Maryland 
southward, and Yucca glauca. This last is a plant with narrow leaves 
and is common and widely distributed over the high plains at the eastern 
base of the Rocky Mountains from Wyoming southward. This hand- 
some plant is perfectly hardy here but has not flowered in the Arboretum. 
Indigofera Kirilowii mentioned in a recent Bulletin has continued to 
grow and to produce its racemes of bright pink flowers in spite of the 
drought of June and early July which has been one of the most severe 
the Arboretum has experienced. This Korean shrub remains a long time 
in bloom. Its habit and foliage are excellent, and it gives every promise 
of being a valuable addition to the list of summer flowering shrubs. 
Two other species of this genus are now flowering on Azalea Path, /. 
decora from China and Japan, with pure white flowers, and I. Gerar di- 
ana with purple flowers, a native of the Himalayas. The low stems of 
these plants are killed to the ground every winter but new ones appear 
in the spring and growing rapidly flower freely at this time. I. decora 
is the more beautiful of the two and well worth a place on the margin 
of any shrubbery or in the herbaceous border. 
These Bulletins will now be discontinued until the autumn. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
