May 3, 1924 
459 
Photoperiodism of Tephrosia Candida 
Table VI .—Length of midrib of leaf as affected by daily light exposures of 10 to 
ISi hours for A series , and normal day length {11 to 11.2 hours) for B series a 
Can No. 
Plant 
No. 
Length 
of daily 
light 
exposure 
Length of midrib 
of second expanded 
leaf below apex 
A 
A 
B 
Hours 
Inches 
Inches 
( 1 
1 
41 
16......... 
> 10 
■1 5 
3* 
1 3 
J 
1 5* 
5f 
Total........ 
* 
15 
131 
Average........... 
5 
4.6 
f 1 
6* 
4* 
14..... 
\ 2 
12* 
6* 
6* 
41 
l 3 
i b ) 
r i 
8* 
41 
17. 
\ 2 
12* 
7* 
4f 
l 3 
<*) 
61 
Total..... ... 
34* 
23* 
Average....... 
7 
4.7 
1 
9 
51 
15....... 
2 
13* 
c7* 
41 
3 
i b ) 
4f 
1 
9* 
51 
18........ ... 
2 
13* 
10 
5? 
3 
91 
71 
Total........ 
44| 
331 
Average. ..... 
9 
5.5 
<* Measured Jan. 19, 1923. 
& Plant was lacking. 
c Plant had wilted and was dying of a root disease when measured. 
Table VII .—Length of pinnae as affected by daily light exposures of 10 to 13\ 
hours for A series , and normal day length {11 to 11.2 hours) for B series a 
Can No. 
Plant 
No. 
Length 
of daily 
light 
exposure 
Length of pinna 
midway of leaf 
Length of terminal 
pinna 
A 
A 
B 
A 
B 
Hours 
Inches 
Inches 
Inches 
Inches 
[ 1 
1 
f 2 * 
if 
21 
21 
16..... 
i 2 
\ 10 
\ 2 
li 
21 
H 
1 3 
1 
1 12 
if 
11 
11 
Total. 
5f 
5f 
61 
51 
Average... 
1.9 
1.8 
2.1 
2.0 
1 
2f 
U 
21 
If 
14...... 
2 
12* 
21 
1* 
21 
If 
3 
21 
iP) 
2f 
i b ) t 
1 
22 
2 
2* 
21 
17 .... ... 
2 
12* 
3 
21 
2* 
2* 
! 
3 
( b ) 
21 
(*>) 
21 
Total.! 
13f 
9* 
12* 
10* 
Average.! 
2.7 
1.9 
2. 5 
2.1 
1 
I 
f 1 
3* 
21 
c 2* 
21 
15........... 
{ 2 
13* 
3* 
If 
2* 
If 
l 3 
( b ) 
2 
i b ) 
2 
f 1 
3* 
2f 
2f 
2 \ 
18. 
i 2 
13* 
3f 
21 
21 
2 t 
l 3 
31 
2f 
2f 
21 
Total...... 
17* 
13 
13f 
13* 
Average..... 
3.5 
2.2 
2.8 
2.3 
a Measured Jan. 19, 1923. 
&This plant was lacking. 
c This pinna was diseased. The corresponding one on leaves above and below measured 3 and 3* 
inches, respectively. 
