35 
near Pekin, was first raised in the Arboretum thirty-seven years ago. 
It is a large, vigorous, hardy plant, with dark green leaves, and one 
of the best of the exotic shrubs which flower here the middle of June. 
Closely related to it are Hydrangea xanthoneura and its varieties 
Wilsonii and setchuensis, and H. Rosthornii raised here from seed col¬ 
lected by Wilson in western China. These plants are hardy and can 
now be seen covered with flowers in the collection of Chinese shrubs on 
Bussey Hill and on Hickory Path near Centre Street. As garden plants 
they do not appear to be in any way superior to H. Bretschneideri. 
Rosa caudata is unfolding its pale pink petals which are nearly white 
toward the base. It is a large, strong-growing, hardy shrub with 
stout arching stems, dark green leaves, and flowers two inches in 
diameter, in wide clusters, each containing from twenty to twenty-five 
flowers. The fruit is orange red, an inch long, contracted above into 
a narrow neck crowned by the much enlarged calyx-lobes. It flowers 
at the same time as Rosa Helenae, and these two species, and R. mul¬ 
tiflora var. cathayensis, are perhaps the handsomest of the Roses dis¬ 
covered by Wilson in western China. 
Indigofera Potaninii. This beautiful little shrub from northern China 
is blooming again in the collection on Bussey Hill. As it grows here 
it is from three to four feet high, with a single stem and slender erect 
branches. The flowers are bright rose-color, half an inch long, in long- 
stalked, erect and spreading racemes from two to three inches in length. 
The flowers are of the same color, but are larger than those of Indi¬ 
gofera amblyantha which Wilson found in western China, and which 
until I. Potaninii bloomed in the Arboretum was considered the hand¬ 
somest shrubby species which can be grown here. 
Viburnum cassinoides adds much to the beauty of the Arboretum 
the middle of June. It is a native of swamps in the northeastern 
part of the country where it sometimes grows twenty feet high with 
slender straggling stems. In cultivation it forms a broad, low, 
round-topped bush, and has proved one of the handsomest of all the 
Viburnums introduced into the Arboretum. The leaves are thick and 
lustrous and vary greatly in size and shape. The flowers are slightly 
tinged with yellow and are borne in wide slightly convex clusters which 
also vary greatly in size. The fruit is larger than that of the other 
summer-flowering American Viburnums, and at first yellow-green later 
becomes pink, and finally blue-black and covered with a pale bloom, fruit 
of the three colors occurring in early autumn in the same cluster. 
Magnolia glauca, or virginiana as botanists now want to call the 
Sweet Bay in the Magnolia Collection on the right-hand side of the 
Jamaica Plain entrance, is again covered with flowers. Often a large 
tree at the south, at the north this Magnolia is never more than a small 
tree, or more often a large shrub. The leaves are dark green and very 
lustrous on the upper surface and silvery-white on the lower surface; 
the flowers are small, cup-shaped, creamy-white and delightfully fra¬ 
grant, and continue to open in succession from the middle of June un¬ 
til August. In all North America there is not a more delightful shrub 
to plant in the garden, or one that will give larger returns in beauty 
and fragrance; yet it is difficult to find it in any quantity in American 
nurseries, and it is unknown to most American planters of this gen- 
