29 
second hybrid or F, generation. These results indicate that the 
two varieties in respect to striped seed-coat differ by one hereditary 
factor, which we refer to by the symbol St. When the white- 
flowered P 50 variety is crossed with a number of colored-flowered 
varieties with non-striped seed-coats, a more complex situation 
obtains in respect to the inheritance of the striped pattern. The 
first hybrid or F, generation from such a cross has colored flowers 
and striped seed-coats, but the second hybrid generation or Be 
produces progeny that fall into two classes in respect to the in- 
heritance of the striping pattern. Approximately nine out of 
every sixteen have striped seed-coats, while the remaining seven 
plants have no stripe on the seed-coats. One such F, family, out 
of 227 plants observed, had 131 with striped seed-coats to gO 
plants with non-striped seed-coats, the theoretical expectation in 
this case being 127. + striped to 99. + non-striped. The striped 
pattern appears only on plants with colored flowers and colored 
seed-coats, but not all these, even in such a hybrid family, have 
striped seed-coats. Taking into consideration both the inheritance 
of flower color and striping in the cross mentioned above, the 
theoretical expectation, provided the two kinds of characters are 
inherited independently of each other, would be 9 colored-flowered, 
striped seed-coat; 3 colored-flowered, non-striped; 4 white-flow- 
ered, non-striped out of every sixteen second hybrid or F, genera- 
tion plants. The results obtained approximate the theoretical ex- 
pectations in general, though there is some question as to whether 
they indicate complete independence in inheritance of the two sets 
of characters. The relation of stripe to many other characters in 
peas has been studied. 
Additional studies to those already reported on the inheritance 
of height in peas show that height is a very complex character and 
that talls crossed with dwarfs in some cases produce first genera- 
tion hybrids that are not as tall as the tall parent. From such 
crosses, several types of dwarfs and talls are produced. Some oi 
the dwarfs with colored flowers have proved to be about the 
latest flowering types we have found. 
