Stout & Boas: STATISTICAL STUDIES IN CICHORIUM 435 
race shows that the descent has been consistently from the plants 
having highest values of а. For the parent of the Е, series (which 
was (A X Е») —4-3 —no. ІІ), the value of a was 21.4, which was 
the highest of the series. The parent in Ше Е, was plant (А X 
Е») —4—no. 3; the value of a for it was 21.6, also the highest of 
the series. The value of a for Ше Е, plant used as a parent was 
I9.9. The values of a for the two original parents was as follows: 
for the wild white-flowered plant А, 19.2 in 1913 and 19.3 in 1914; 
for the plant of Barbe de Capucin, E», 23.0 in 1913 and 23.6 in 
I914 (these values are of slightly higher relative value as the 
plants are older than one year). 
The race is, therefore, one of high average values, the average 
of a being above 20.0. Selection for high values of a has main- 
tained a high average. The race has shown a strong tendency to 
irregular sporadic partial variability in that high numbers of 
flowers are frequently developed in a few heads. 
B. The history and. characteristics of a dwarf, sparsely branched 
race (race 2 or line (A X Ex) —4-6—). At the extreme right 
foreground of PLATE II are shown several characteristic plants 
of this very decidedly dwarfed race. In general habit of growth 
and susceptibility to the tip-rot this race is quite like the semi- 
dwarf just described. It is, however, of much smaller stature and 
is less branched. Nine plants of the F; and twenty of the Е, have 
been quite uniform in general appearance when mature. Sta- 
tistical data on flower number were taken from six plants of the 
Ез and from nine plants of the Fs, these plants being the ones least 
injured by the tip-rot. 
In agreement with the extremely dwarf habit, the total number 
of heads produced by these plants is low, the average for the nine 
plants studied of the Е, being 95 for the entire season of growth. 
This dwarf race is a sister race of race 1, noted above, in that the 
two descended from the same Е, plant (А X Ex) no. 4. Тһе 
number of heads open in any one day was so low that on only one 
date were то heads open in a single day on any of the 1916 crop. 
The period of bloom was somewhat shortened. 
The highest flower number for any head was 22 and the lowest 
was I2. There was no tendency to the production of extremely 
high numbers per head for a few heads, as seen in the semi-dwarf 
