372 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
TABLE 8 
SEASONAL DISTRIBUTION OF NUMBER OF FLOWERS PER HEAD FOR FIRST YEAR OF 
BL Е AN Fi GENERATION PLANT (Ез ХА) по. 7 DERIVED BY CROSSING А 
PLANT OF BARBE DE CAPUCIN (Es) AND THE WILD PLANT (А). ЮАТА FOR 1013 
Number of flowers AND Е 
ре head 6 8 II 14 19 21 26 28 3o E 
IB x ga ceret БН ӘКЕМЕ cu bae b eb Fior I I 
Кесек Cem bs. UE LEE Pus ЭТА MIA rid js 2 5 
18 2 3 2 3 3 5 2 6 3 29 
19 6 6 4 6 5 5 2 3 I 38 
20 2 I 3 а Sealer "ca е. 8 
aqu uc е duis dd. rites ебе 2 
Averages... s.es se 19.0 | 18.8 | 19.3 | 18.9 | 18.3 | 18.7 | 18.5 | 18.2 | 17.6 | 83 
[o] = 18.6 a I9.I 
[o] = — 3.17 b = — 0.045 
Ш = 12 t 24 
[2] = 69.89 
season advanced. The range of intraseasonal partial variability 
was slightly increased in successive years, but there are very 
marked differences in the length of the blooming period, in the 
total number of flowers produced, and in the rate of decrease. 
The length of blooming period in the first year of bloom for this 
plant was rather below that of the average one-year-old plant. 
The average number of flowers per head for 1913 is 18.6, for 1914 
it is 19.0, and for 1915 it is 18.7. The values of the first date of 
bloom are 19.1, 20.9, and 19.9. Aside from the rate of decrease 
the various values are not widely different. In this respect the 
plant in question is one of the most uniform that we have studied. 
exhibiting, perhaps, the least interannual variability with respect 
to values [o] and a. 
The interannual partial variability was usually more pro- 
nounced than in the plant noted above. Frequently the annual 
performance was quite divergent in nearly all respects. One of 
the most marked of such cases is seen in the plant for which data 
are given in TABLES II, 12, and 13. 
In the first year of growth (TABLE I1), this plant exhibited a 
rather short period of bloom, the number of flower heads produced 
was low; the range was only 20-17. In the second year (TABLE 
12), the period of bloom was much extended, the total production 
