STERILITIES OF WILD AND CULTIVATED POTATOES. 
9 
Table 1. — Potato crosses grouped according to pollen parent recorded by the United 
States Department of Agriculture during the 9-year period from 1914 to 1922, inclu- 
sive — Continued . 
Date of 
crossing. 
Parents. 
Classes 
involved 
in cross. 
Number of— 
Flowers 
crossed. 
Seed 
balls 
produced. 
Percent- 
age of 
success. 
Aug. 
July 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
July 
10, 1914 
28, 1916 
7. 1914 
10. 1914 
10. 1915 
8, 1914 
10, 1915 
10. 1914 
8. 1914 
10,1914 
3. 1915 
8, 1914 
13. 1915 
7, 1914 
10. 1914 
13. 1915 
8, 1914 
7, 1914 
11. 1915 
28. 1916 
Aug. 10,1915 
Aug. 16,1915 
Aug. 10,1915 
Do 
Do 
Aug. 13, 1915 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
Aug. 
7, 1914 
8, 1914 
10, 1915 
7, 1914 
8, 1914 
7. 1914 
Do. 
July 16,1921 
July 30,1921 
Aug. 2,1921 
July 23,1919 
July 22,1920 
Aug. 5, 1917 
July 18,1919 
July 20,1920 
July 22,1920 
July 21,1921 
July 25,1921 
Do 
July 18,1919 
Aug. 5, 1917 
Do 
Aug. 6,1917 
McCormickX Busola 
...do 
New Scotch RoseX Busola. 
Non Blight X Busola 
do 
NorcrossX Busola 
President RooseveltX Busola 
Prosperity X Busola 
RadiumX Busola 
Rural New Yorker x Busola 
do 
Rust ProofxBusola 
Seedling 18714X Busola 
Seneca BeautyxBusola 
Sir Walter Raleigh X Busola 
Solanumsp. (S. A. No. 6)XBusola. 
State of MaineX Busola 
VigorosaX Busola 
White McCormickX Busola 
Yellow-fleshed varietvX Busola 
Total and average . 
Bull MooseXCacha Negra (S. A. No. 7) 
BusolaxCacha Negra (S. A. No. 7) 
Dibble's Russet XCacha Negra (S. A. No. 7) . 
Green Mountain xCacha Negra (S. A. No. 7). 
ManilaXCacha Negra (S. A. No. 7) 
NorcrossX Cacha Negra (S. A. No. 7) 
Total and average.. 
Beautv of HebronXCedon. 
Gold CoinxCedon 
Green MountainxCedon. . 
Irish Cobbler xCed on 
McKinley xCedon 
New Scotch RoseXCedon. 
White Elephant XCedon.. 
Total and average. 
American Giant X Clio 
....do 
....do 
CommandantxClio 
Cummings' PrideXClio 
Doma(S. A. No. 18)xClio 
Seedling 11844XClio 
do 
....do 
....do 
....do 
Seedling 37662XClio 
Seedling 38774XClio 
Solanum sp. (S. A. No. 37)XClio. . 
Solanum sp. (S. A. No. 92) X Clio. . 
Solanum sp. (S. A. No. 148)XClio. 
Total and average . 
July 31, 1919 | ClioX Commandant 
Aug. 6,1917 | CongoX Commandant 
Do j Green MountainX Commandant 
Aug. 5, 1917 Morada (S. A. No. 84) X Commandant 
July 17,1919 j Seedling 3S774X Commandant 
Aug. 5,1917 \ Solanumsp. (S. A. No. 37) X Commandant.. 
Aug. 6,1917 | Solanumsp. (S. A. No. 148) X Commandant. 
Do 1 Solanumsp. (S. A. No. 152) X Commandant. 
Total and average . 
AX1 
AX1 
AX1 
AX1 
AX1 
AX1 
AX1 
AX1 
-XI 
AX1 
AX1 
-XI 
AX1 
AX1 
AX1 
—XI 
-XI 
AX1 
AX1 
AX1 
-XI 
AX1 
AX1 
AX1 
AX1 
AX1 
AX3 
AX3 
AX3 
AX3 
— X3 
AX3 
AX3 
AX1 
AX1 
AX1 
-XI 
BX1 
-XI 
AX1 
AX1 
AX1 
AX1 
AX1 
AX1 
AX1 
—XI 
-XI 
-XI 
AX- 
AX-' 
AX— ' 
1,323 
200 
70 
176 
78 
610 
10 | 
33.33 
73.75 
50.00 
72.73 
70.37 
40.00 
20.51 
66.67 

66.67 
72.50 
9.09 
61.45 
26.32 
80.00 
4.62 

85.71 
40.00 
100 
46.11 
7.14 
38.71 
47.37 
18.75 
52.00 
34.00 








22.73 


23.08 
15.38 



5.68 
2.04 







60229— 24— Bull. 1195- 
