62 
interest. The numbers in parentheses refer to the different 
crossings, as numbered above. 
(2) The Chinese chestnut, as far as blight resistance is con- 
cerned, is our finest stock. For the whole six years we have had 
these trees they have never shown a sign of blight. Of the row 
of fifteen trees the average height is now about 8 feet. Several 
are 9 feet high, and two are eleven. In spite of repeated pruning 
of the lower branches, they persist in developing into a low- 
headed form, z.e. the side branches grow out with greater vigor 
than the main shoot. Therefore, in view of our aims, a crossing 
with the more upright-growing American chestnut seems desirable 
(4) In our form of the Chinese chestnut only one, if any, 
bur appears at the base of a flowering branch. The dwarf 
species, C. Seguini, from Eastern and Central China, on the 
other hand, is most prolific; and, in addition, blooms from 
June to October. It will be seen that crosses of these two species 
may y produce valuable breeding stock. 
“S8,”’ a cross made by Dr. Van Fleet, is said to be a 
ae ae of the chinquapin, C. pumila, and the Chinese chestnut 
It is extremely prolific, but, unfortunately, 
Therefore we gave it a dose 
C. mollissima. 
somewhat susceptible to the blight. 
of the resistant Japanese this year, and hope for more disease 
resistant offspring. “‘S8,” pollinated with mollisstma, gave 
negative results. 
Data on Hybrids now Growing at THlamden- 
now growing at Hamden 97 Japanese-American hybrid chestnuts. 
This figure does not include, of course, the 57 hybrid nuts formed 
The heights and numbers of the 
In all, there are 
as a result of crosses this year. 
hybrids at Hamden are as follows: 
or Growtu RATES OF JAPANESE-AMERICAN HyBRID CHESTNUTS AT 
TABLE 
HAMDEN, CoNNeEcTICUT, 1934 
Number of Trees Average Height Average L as h 
Name Li iving October October Growth, 1934 
Wolle 103 lescaciusaus I 4 ft. 10 in 
Hammond 1931. 4 4 ft. 10 in. 1 ft. 2 in 
Hammond 1933...... 7 1 ft. 3 in. 1 ft. 3 in 
Minturn 1933........ 8 1 ft. Sin. 1 ft. 5 in 
Smith 1931.......... 47 3 ft. 5 in. 1 ft. 1 in 
Smith 1932.......... 27 1 ft. 4 in. 8 in 
Winthrop. 1931 ...... 3 2 ft. 9in 11 in 
