Srovur & Boas: STATISTICAL STUDIES IN CICHORIUM 379 
TABLE 15 
SEASONAL DISTRIBUTION OF NUMBER OF FLOWERS PER HEAD FOR THE SECOND YEAR 
F BLOOM (1916) FOR THE PLANT (Ex X А)-то-по. 17. DATA FOR FIRST YEAR 
GIVEN IN TABLE I4 
à embe | July я | August Е 
о owers 1 n 
per head | 5 |,7 о | 13 | | 28 | ax 24 | 27 | 29 yd ees а 15 18 | 25 | 28| | 
| | | 
нен Em | 
I4 тЫ ра ЕСТЕ: а Рет 7 
ї$ 2 RAF si fg sl 1:16 | 6 | ГАЛЫМ A db ds acl 
16 1|5|Ғ1|113213 Ae oe раз ат В СПА, 37 
I7 Зра 6 |4 |3 ааа са а | 2 ЗЕ 36 
18 І І 3|21--.1. i borsa кл А Ios 8 
19 r2 d р лр GARE 3 
20 yid HE Vieh ыле) ы! 2 
21 I 45-1. | fe | | о ; І 
ЖЕЙ | | | quy ener 
© о t». "fiu aia № + nm) 4 о о з 
Averages ра: е ЧЕНЕНЕ S Eas og бі: E En + +| 4152 
ч - Lal а ч к M - - к - - - к4 к mo 
ЖАЙЫ Жөні БАРЫС ааа на AE По Miis [еле 
[о] 15.8 a= 17.1 
[ot] = — 13.90 b = — 0.054 
[1 = 24 t= 54 
ІРІ; 261.11 
2. INDIVIDUAL VARIABILITY 
The various types of intraseasonal variability noted above 
are in reality records of the performance of individual plants 
during a seasonal period of growth. The differences noted between 
them as individuals are, therefore, evidences of individual varia- 
bility. Individuals may differ decidedly in respect to one or 
more values, total production of heads, average and range of 
number of flowers per head, or amount and rate of decrease. 
These differences may appear among plants of the same age. 
The interannual variability and especially that seen in the 
first two years of growth indicates clearly that much individual 
variability may exist in plants of different ages. 
The inter-relations of individual variability and partial vari- 
ability are here very evident. Any estimate of the former involves 
the latter in one or in all its aspects. It seems, therefore, clear 
that the question of an adequate judgment of the individual must 
be based on full performance at least during one season of growth, 
and that the comparison of individuals should be made for plants 
of the same age. 
