88 
Research Bulletin No. 2 
was Three stalks and the mean number of its stalks a little over 
two and a half. Evidently its one-stalked F 2 parent was a minus 
variant of a two-stalked or three-stalked type. Similarly family 
1146 had a modal value of five stalks and a mean of about four 
and a quarter, while its F 2 parent had only three stalks, and 1149 
had a mean of only about two stalks, tho its F 2 parent had four. 
Family 1139, whose F 2 parent also had four stalks, had a mean 
of nearly four and a quarter stalks. The four stalks of the 
parent of 1149, however, consisted of one main stalk and three 
Fig. 19. Three F 3 families of Tom Thumb pop X Missouri dent showing 
marked differences in number of tillers. September 19, 1911. 
rather short suckers, while all the four stalks of the parent of 
1139 were tall. That this difference, tho possibly significant, 
cannot be relied upon is shown by the fact that families 1132 and 
1140, the F 2 parents of which, like that of 1149, had only one 
stalk and three suckers, had four stalks as their modal class and 
between three and four stalks as their means. 
The most significant fact established by these F 3 families as a 
whole is that from the segregates of F L , were produced types with 
various numbers of stalks ranging from one parent type to the 
other. Tu forming an idea of the types represented by the parent 
