310 



The Journal of Heredity 



THREE GENERATIONS OF CHESTNUTS 



FiGURK II. The topmost row consists of two Japanese chestnuts on the left and three 

 American sweet on the right. The next two rows are nuts from the three first genera- 

 tion hybrid trees, the group of four nuts on the left being from the Blair tree, the center 

 four from the Boone, and the four on the right from the Riehl. Note the similarity in 

 size, shape and the amount of tomentum. Tne last three rows are made up of selections 

 from the 175 trees raised from the Boone, tree, and show the extreme variation encoun- 

 tered in the, second hybrid generation. See text, p. 313. 



