Complimentary 
NEW SERIES VOL. lil 
3 
NO. I 
ARNOLD ARBORETUM 
HARVARD UNIVERSITY 
BULLETIN 
OF 
POPULAR INFORMATION 
JAMAICA PLAIN. MASS. ' APRIL 30. 1917 
Effects of the Winter in the Arboretum. The effects of the heavy 
rainfall of the past summer and of the hot dry autumn which thor- 
oughly ripened the wood of trees and shrubs are now shown in the 
generally good condition of the Arboretum collections which promise 
abundant crops of flowers and fruit. A few flower-buds have been 
killed, and there are occasionally brown leaves on Rhododendrons and 
other broad-leaved evergreens, but not so many as usual at this season 
of the year. Exotic conifers, including the new Firs, Spruces and 
Pines from western China, are generally uninjured but the foliage of 
the native White Cedar {Chamaecy parts thyoides) is badly disfigured. 
For some reason not easy to explain this tree has never taken kindly 
to the Arboretum conditions, and suffers here more or less every 
winter. 
It is a late spring in eastern Massachusetts, but several plants have 
already flowered in the Arboretum or are now flowering here. The 
flowers of the White Maple (Acer saccharinum) have nearly passed, 
but those of many of the Elms are now open and have rarely been 
more abundant; and the Scarlet Maple {Acer rubrum) enlivens the 
landscape with its bright red flowers. 
Winter-flowering Witch Hazels. The flowers of these interesting 
plants have never been more beautiful and abundant than this year, 
although they appeared much later than usual. The flowers of Ham- 
amelis vernaliSy the species from southern Missouri, usually open late 
in December and in January, and those of the Japanese and Chinese 
species are usually fully open in January and February; but with the 
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