69 
is continually exposed to infection from the chestnut blight fungus. 
The woods surrounding the planted trees contain frequent dis- 
eased basal shoots of native trees. This is as it should be. We 
are not trying to protect the trees from the blight. In order to 
discover whether or not our hybrids are resistant it is well to have 
them thus continually exposed to the disease. [Eventually—per- 
haps in two or three years—we shall inoculate all of the older 
hybrids in order to secure positive evidence on this point. With 
two or three possible exceptions, where the seedlings have been 
weakened by drought or some other cause, we have not yet found 
any of our own hybrids affected with the blight. This is nothing 
unusual, since such apparent immunity is to be expected in young 
seedlings. Some of the older Japanese trees have suffered to a 
slight degree, the infection apparently following winter killing 
of the tips of shoots. The Chinese trees, now seven years old 
and in many cases over seven feet high, have remained entirely 
clear of the blight. 
Some of the seedlings in the Hamden plantation, received from 
the U. S. Department of Agriculture during the years 1929-31 
inclusive, blossomed in 1933, as follows: 
Number of 
Trees Kind Age 
1 C. mollissuna (Chinese) 2.2.0... c cece eee cee ee 7 years 
id S-8 U.S. D. Hybrids (C. mollissima * pumila) 7 “ 
I FOOS6 4 ClaApanesen sess ed enc area Slee: Be 
1 TEOLIAE (SADANCSE)) © aise sick acicdia die nea Aes cee ON ai 
1 F. P. T (1931) i SDE PA ac kessde (0 cadet cea ance 4 * 
With the exception of the shrubby C. Seguinit, which bears nuts 
regularly every year, only one nut was obtained, namely from a 
Japanese tree of the forest type (No. 78627) received from the 
Geos BAe in 9380: 
Other Plantations —Besides the plantation at Hamden, Con- 
necticut, the following seedlings were given to several interested 
people, who had them planted on their own land, as follows: 
May 5. 12 Castanea crenata to Miss Maud H. Purdy, Pomona, 
Ney 
May 12. 12 Castanca crenata to Dr. M. F. Schlesinger, Monroe, 
IN 
