12 
Some of the plants of this small tree are dead or badly hurt, but one 
tree in the nursery at the top of Peter’s Hill is uninjured. 
Malus cerasifera. The earliest of the Asiatic Crabs to bloom is be- 
lieved to be a hybrid between Malus baccata and M. prunifolia, which 
has generally been called M. cerasifera. It is one of the largest of 
these trees, and in good soil and with abundant space it can form a 
wide-branched, round-topped, shapely tree. The flowers are larger 
than those of other Asiatic Crabapples, pure white and fragrant, and 
the fruit is globose, rather dull red, and sometimes an eighth of an 
inch in diameter. 
Malus baccata var. mandshurica. Another desirable Crabapple as a 
flowering tree is the variety mandshurica of M. baccata, a common 
north China, Korean and Japanese plant. This has pure white flowers 
only a little smaller than those of M. cerasifera and more fragrant 
perhaps than those of any other Apple-tree. Last week a good speci- 
men of this Crabapple in the Peter’s Hill Collection was covered with 
flowers which perfumed the air for a long distance. Another still little 
known species, Malus micromalus, has been unusually attractive with 
its small pink flowers. This is a tree with erect branches which form 
a narrow pyramidal head, and smooth pale bark. Its habit will make 
it valuable in many gardens. 
Korean Azaleas. On the upper side of Azalea Path two Korean 
Azaleas, Rhododendron Schlippenbachii and R. poukhanense have been 
covered with flowers during the past week. The former has large ob- 
ovate leaves and white flowers more or less tinged with rose, and from 
three to three and one half inches in diameter; the corolla is thin and 
delicate in texture, and when fully exposed to the sun soon fades. 
The flowers will probably last longer in partial shade. The plants 
appear perfectly hardy in the most exposed position. This is a common 
shrub on the grassy slopes above the cliffs on the Korean coast and 
other parts of that country, but has remained little known in gardens, 
although its flowers are perhaps the loveliest of all Asiatic Azalea 
flowers. Rhododendron poukhanense has been covered again, as it has 
been every spring for several years, with its clear rose-colored fragrant 
flowers. This is one of the best of the Azaleas introduced by the 
Arboretum into American gardens, and a hardy decorative plant of 
first-rate importance. 
An illustrated guide to the Arboretum containing a map showing the 
position of the different groups of plants has been published. It will be 
found useful to persons unfamiliar with the Arboretum. Copies of this 
guide can be obtained at the Administration Building in the Arbor- 
etum, from the Secretary of the Massachusetts Horticultural Society, 
300 Massachusetts Avenue, Boston, from The Houghton, Mifflin Com- 
pany, 4 Park Street, Boston, and at the office of the Harvard Alumni 
Bulletin, 18 Plympton Street, Cambridge. Price, 30 cents. 
