57 



Jul}' 11. From ^Ir. Alfred J. Frnch, West Cornwall. Conn. 



Pollen of C. dciitata. 

 July 18. From T. V. A., Xorris. Tcnn.. through Air. J. C. AIc- 



Daniel. Pollen of C. uioUisshna (S.P. 686). 



Besides the above sources of C. dcntata pollen, I bagged some 

 roadside shoots in the town of North FTaven, Conn, (as I had 

 done for the past two years) and also, on July 10, secured a good 

 quantity from roadside shoots on the pro]XM-ty of Mrs. J. A. 

 Burden, Jr., Syosset. Long Island. Some of our trees raised 

 from nuts from Portland, Maine, and ]:)lanted in the spring of 

 1926, were yielding pollen, and this also was used. 



Smiiinary of A'c-cv Hybrids. — During 1938, 11 new hybrid types 

 resulted from our pollination work. Since man}^ of our earlier 

 hybrids were new, any crosses made with them are necessarily 

 themselves new. \Yc have now made, in all. 43 new combinations 

 of Casfaiica. We are not, however, striving to make as many 

 new combinations as possible ; we are only trying to reach our goal 

 through several different routes. During 1938 we sectu-ed 930 

 nuts (that is, 930 potential hybrid trees) from the different crosses 

 made at Flamden in 1938. 



Following is a table (p. 58) showing the growth, in recent years, 

 of a few of our best hybrids. 



Cooperative Plantings. — The number of In-brids is growing at 

 such a rapid rate (704 hybrid nuts last year and 930 this year) 

 that there is no longer room to set out all of the young trees on 

 our ow-n plantations at Hamden. Therefore, in 1938, we entered 

 on a system of cooperative plantings, and in accordance with this 

 plan sent 276 of our 1938 hybrid nuts to Dr. W. W. Herrick, who 

 has a large farm at Sharon, Conn. The trees on Dr. Flerrick's 

 land will be in charge of his gardener, Mr. Adolph Anderson, and 

 will be ins])ected by us occasionally and used for further breeding 

 or for [)ropagation whenever we think it is advisable. 



A similar arrangement was made with the New Haven Water 

 Company, through Prof. Ralph C. Hawley of the Yale School of 

 Forestry. 323 of our 1938 hybrid nuts were given to Mr. Frank 

 Stowe, foreman in charge of the grounds at the Maltby Lakes 

 region. The remainder of the hybrids were planted in our cold 

 frames at the Brooklyn Botanic Garden. 



