392 
Journal of Agricultural Research 
Vol. IX, No. it 
eral appearance, there is seldom any doubt regarding the class to which a 
plant should be referred; but when the differences are formulated, there 
is some overlapping. The most obvious tassel characters are the long 
glumes, the pendent tassel, and the presence of pistillate flowers. Of 
these, the length of glumes appeared to be the most significant, and was 
the only one systematically recorded. When the glumes are over 2 5 mm. 
long, the tassel in most instances obviously belongs to the full-tunicate 
class. In classifying the ears, the length of the glumes is also the best 
character. The dividing line here falls on 45 mm. 
There were but three half-tunicate plants in which the length of the 
staminate glumes exceeded 24 mm. There was, however, no percepti¬ 
ble correlation between the length of glumes in the male and female in¬ 
florescences among the half-tunicate plants. One hundred and twenty- 
three plants were referred to this class. The expected was 122. The 
nearest approach to an intermediate between half-tunicate and normal 
plants is shown in Plate 19. 
Full-tunicate plants. —Fifty-three plants were classed as full 
tunicate. Of these, 12 produced no ear. Of the remainder, all but 4 
had staminate glumes at least 25 mm. long. There is, then, almost a 
perfect correlation between the type of tassel and the type of the ear; 
but here again there is no correlation inside the group. 
Even the group of plants that were earless did not differ from the 
plants with ears with respect to the length of the staminate glumes. 
There were, in addition, 6 full-tunicate plants with tassels destroyed 
through accident, making a total of 59 plants in this class. The expected 
number was 61.2. 
Ramosa plants. —Sixteen plants with pure ramosa ears all had ramosa 
tassels. The expected number was 20.4. 
TunicaTa-ramosa plants. —There were 60 plants that'exhibited both 
ramosa and tunicata characters. Of these, 23 exhibited the characters of 
both parents in the tassel as well as the ear. The remaining 37 plants 
all had ramosa tassels in which no tunicate characters were obvious 
(PI. 20, A). 
Of the 23 plants which exhibited both ramosa and tunicata characters 
in the tassel, 19 had cauliflower ears (PI. 20, B), 3 showed mixtures of 
cauliflower and tunicate tendencies, and 1 produced no ear. 
In the 37 plants which showed no tunicate character in the tassel, 2 
produced cauliflower ears, 11 showed mixtures of cauliflower and tuni¬ 
cate, and 24 were both branched and tunicate without cauliflower 
(PI. 21). 
In addition to the above, there were 4 plants in which the tassels were 
accidentally destroyed, making a total of 64 plants in the group. The 
expected number was 61.2. The nature of the plants combining the 
characters of both parents is shown in Table IV. 
