FLOWEKS AND BOLLS OF PIMA AND ACALA COTTON 
19 
Acala a tendency may be noted for the outer nodes to retain squares 
longer than nodes nearer the main stalk, among squares that ap- 
peared at the same time. Squares on specific nodes of the fruiting 
branches of the vegetative limbs of both varieties appear to have 
been retained somewhat longer than those on corresponding nodes 
of the branches on the main stalks. 
Table 11. — Mean age at time of shedding of the squares that appeared in 10-day 
intervals throughout the season of 1924 on specific nodes of the fruiting branches of 
20 Pima plants and of the fruiting branches on the main stalks and vegetative 
limbs of 20 Acala plants 
Acala 
10-day interval 
Main stalk 
Vegetative limbs 
Fruiting 
branch 
node 
Num- 
ber of 
squares 
Age at time 
of shedding 
(days) 
Num- 
ber of 
squares 
Age at time 
of shedding 
(days) , 
Num- 
ber of 
squares 
Age at time 
of shedding 
(days) 
fl 
36 
24 
13 
25 
27 
15 
4 
8 
19 
22 
9 
6 
37 
49 
36 
4 
18 
18 
16 
4 
16 
33 
52 
13. 056±0. 403 
11.917± .568 
11.769± .286 
13.400± .652 
12.444± .654 
11.733± .549 
19 
17 
16 
23 
27 
27 
13. 211 ±0.986 
10.471± .496 
9. 562± .845 
9.522± .549 
9.852± .879 
8.000± .560 
13. 981 ± .681 
11.286± .930 
10.235± .868 
12.182±1.683 
17. 192± . 348 
12. 909±1. 400 
14.579± .858 
13.435± .818 
17.609± .348 
18. 222±2. 228 
18.722± .849 
19.400± .724 
20.645± .443 
17. 500±2. 964 
19. 500±l. 399 
18. 778± . 935 
19.625±1.038 
9 
12. 667±1. 011 
June 16 to 25 
t™ 
fl 
50 
8 
13.360± .612 
2__ 
13.125±1.458 
June 26 to July 5 
k„: 
U to last... 
fl 
8.000±1.012 52 
14. 000±1. 066 
13.789± .638 
14.818± .586 
14.667± .861 
14.333± .588 
14. 622± . 608 
12. 633± .458 
12. 472± . 550 
17. 500± 1.106 
14.667± .730 
15.778±1.097 
13.500± .823 
15. 500±1. 609 
18.312± .904 
15.212± .527 
17.538± .532 
14 
17 
11 
99 
11 
19 
23 
115 
9 
18 
15 
62 
4 
10 
9 
16 
51 
26 
14.725± .730 
July 6 to 15-. 
2. 
14.923± .603 
J3_ 
[4 to last... 
fl.. 
41 
20 
16.805± .615 
July 16 to 25. 
2 
13.900± .597 
3 
U to last... 
fl. 
14 
11 
18. 500±1. 131 
July 26 to Aug. 4 
2 
12.909± .928 
3 
U to last... 
fl... 
3 
17.333±3.137 
Aug. 5 to 14.. 
J2 
13 
U to last... 
In recording the ages of the squares which shed in 1925 it was ob- 
served that many of the Acala squares which shed from the last node 
of the fruiting branches on the main stalks or on the vegetative 
limbs and many of those which shed from the fruiting branches of 
one node, at the top of the main stalks or of the vegetative limbs, 
were abnormally old when shed. These squares had been noted 
during the growing season, and it was observed that after they 
reached a size of several millimeters in diameter they grew very 
slowly or remained entirely dormant through long periods of observa- 
tion. Such squares were never seen to resume normal growth and 
to flower, but in every case they eventually withered and shed. In 
preparing Table 12 all squares of both Pima and Acala at the ends 
of long fruiting branches and on branches of only one node, at the 
top of the main stalks and of the vegetative limbs, were omitted, 
but such data are shown separately in Tables 13 and 14. The ages 
of the squares are arranged in 10-day intervals, based on the date of 
appearance of the squares, throughout the season. So few of the 
squares which shed in 1924 from these positions were older than 
those which fell from the inner nodes of the fruiting branches that 
they were included in Table 11. 
