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tunately the flowers were ruined as they opened by the excessive heat 
of last week. Rosa multijlora cathayensis is again covered with its 
great clusters of pink flowers and expanding flower-buds. The Chinese 
representatives of the white-flowered R. multijlora of Japan, it is one of 
the most beautiful Roses of its class, and interesting as the wild type 
from which the Chinese derived the now well known Crimson Rambler 
Rose and another old-fashioned garden plant, the Seven Sisters Rose 
(Rosa multijlora platyphylla). Rosa Helenae, which some persons con¬ 
sider the handsomest of the Roses discovered by Wilson in western 
China, will be in flower again in a few days. It is a large shrub with 
slender arching stems furnished sparingly with small red spines and 
many-flowered clusters of pure white delicately fragrant flowers an inch 
and a quarter in diameter. It well deserves a place in any collection 
of single-flowered Roses, however small. 
Rhododendron (Azalea) ealendulaceum. A lover of flowers who has 
had the good fortune to see the yellow-flowered Azalea in June on the 
wooded slopes of the southern Appalachian Mountains can never forget 
it. North America does not offer a more beautiful flower show. No 
other North American shrub has such brilliantly colored flowers; and 
no other Azalea hardy in New England can be compared with it in the 
variety of color found in its flowers. The flowers of the Korean Aza¬ 
lea Schlippenbachii are larger and more delicate in texture and color, 
and those of the Japanese A. Kaempferi are more surprising, for it 
is always a surprise to find the bright red flowers of this Azalea on a 
bare New England hillside. These plants when they are in flower look 
exotic here and do not fit our American surroundings as well as our 
yellow-flowered plant. The flowers, too, of the American plant remain 
in good condition longer than those of any of the Asiatic Azaleas, and 
they were not injured by the excessive heat of last week which spoiled 
the flowers of many other plants. A good many plants of R. calendu- 
laceum have been raised at the Arboretum from seed, and many of the 
seedlings which are now blooming on Azalea Path show the variation in 
the color of the flowers from clear yellow to flame, which adds to the 
interest of a collection of these plants in early June. Single plants of 
this Azalea have also been planted among other shrubs on the borders 
of some of the drives, and these show how this Azalea can be used 
with advantage in New England plantations. 
The Climbing Hydrangea (Hydranga petiolaris), which made last 
summer a large growth on the Administration Building, is as thickly 
covered with its broad flower clusters now as it has been in previous 
years. It is still the only climbing plant with conspicuous flowers able 
to attach itself firmly to a stone or brick wall, which can be grown in 
this climate. The fact that it is one of the first plants here to unfold 
its leaves adds to its value as a cover for the walls of buildings. 
Laurels (Kalmia latifolia). When this number of the Bulletin reaches 
its Massachusetts readers the Laurels at the northern base of Hemlock 
Hill will be in bloom and never before have these plants been so thickly 
covered with flowers. They furnish the last and for many persons the 
most beautiful of the great Arboretum flower displays of the year. 
