STERILITIES OF WILD AND CULTIVATED POTATOES. 
25 
bilities and cross-incompatibilities in this strain of Solarium chacoense. 
(See PL VIII, fig. 2.) 
Table 5. — Resultsof hand pollinations in Solanum fendleri, all selfed, in 1921 and 1922. 
Number of— 
Plant. 
Number of— 
Plant. 
Flowers 
pollinated. 
Seed balls. 
Flowers. 
| pollinated. 
Seed balls. 
No. 1 
No. 2 
1 
2 
2 
2 
3 
7 
1 
2 
9 
2 
2 
6 
. 
2 
2 
2 ! 
2 


8 
2 
1 
2 
No. 2-6 
No. 2-8 
No. 2-9 
::::: A 
10 
1 
7 
No. 3 
3 
No. 4 
No. 2-10 
No. 2-11 
No. 2-12 
2 
3 
... . 3 
2 
No.5 
1 
No. 6 
1 
No. 7. . 
No. 2-13 
2 
1 
No.8 
No. 11-3 
No. 11-7 
8 
8 
No.9 
1 
No. 11 
No. 11-9 
6 
4 
No. 2-1 
No. 2-2 
No. 11-11 
No. 11-14 
! 1 
5 
5 
5 
Of the 24 plants of Solarium fendleri grown from seed and listed in 
Table 5, all but two produced seed balls to controlled self-pollinations. 
For the two plants that failed only 1 and 2 flowers, respectively, were 
selfed, so the failures for this may be due to experimental error. It 
appears that this strain of S. fendleri is highly if not completely 
self-compatible. 
Table 6. — Results of hand pollinations in Solanum jamesii, in 1921 and 1922. 
Selfed. 
Number of— 
Plant. 
Number of— 
Plant. 
Flowers 
pollinated. 
Seed balls. 
Flowers, 
pollinated. 
Seed balls. 
No. 2-5 
4 
7 
4 
I 
5 
3 
6 
7 
2 
3 
2 
4 

10 






1 
o 



No. 15 
No. 16 
No. 17 
No. 18 
No. 19 
No. 20 
No. 21 
No.22 
No. 24 
No. 27 
No. 28.. 
3 
! 
8 
7 
7 
12 
8 
5 
6 
8 
4 
6 
1 
No.3 (F) 

No. 3-1 
No. 3-3 
No. 3-5 (F) 
1 

o 
No. 3-6 

No. 4 
No. 4-1 
No. 4-2 
No. 4-3 
No. 4-5 





No.9 
No. 29.. 

No. 10 
No. 30 
1 
No. 11 
2 
No. 31 
No. 13 
21 

Crosses Between Different Plants Within the 
Species. 
Number of— 
I 
Parents. 
Number of— 
Parents. 
Flowers 
crossed. 
Seed balls. 
Flowers, 
crossed. 
Seed balls. 
No. IXNo.12 
3 
2 
2 
4 
3 
1 





No. 3XNo 13. 
1 

No.1XNo.13 
No. 4(F)XNo.3(F). 
No. 4-6XNo. 16... 
1 

No. 2-1 X No. 16 
5 
12 
5 
2 
1 
No. 2-3XN0.16 
No. 8XNo. 13.. 

No. 3XNo.3(F). . 
No. 14XNo. 13 

No. 3XNo.8 
No. 26XNo.3-4(F) 

1 One small seed ball started to develop, but fell off when about one-eighth of an inch in diameter. It 
contained no seeds. Later in the season this plant produced normally developed seed balls, both 
naturally fertilized and inbred, under paper sacks. 
