NOTES ON POLLINATION OF RED CLOVER 
365 
cipitation of 17.55 inches, which is much above* the normal for 
Ames. The bees seemed rather bewildered by being: enclosed 
in the cage, and many of them died in the efforts to find their 
way out. They did not, however, work very freely on the 
clover heads in the cage, although one or two bees could be seen 
on these heads at almost any time that the weather was favor- 
able for their activities. It was found that 500 heads in the 
cage produced an average of 18.7 seeds, while 500 heads in the 
field twelve feet away from the cage produced on an average 
of 35.0 seeds. 
The results are not such as to give much confidence in the 
ability of the honey bee as an effective pollinator, under all cir- 
cumstances, although they do seem to be able to accomplish 
pollination during some seasons. 
Department of Botany, 
Iowa State College. 
BIBLIOGRAPHY. 
(1) Cook, A. J., Report of agricultural experiments in 1891: U. S. 
Department of Agriculture, Bureau of Entomology, Bull. 26, 
83-92, 1892. 
(2) Bailey , H. L ., Fertilization of clover and alfalfa: North Dakota 
Agricultural Experiment Station, Annual Report, 17, 34, 1907. 
(3) Fruwirth, C Rotklee, Selbst — und Fremdbestatibung: Die Zuch- 
tung der Landwirtschaftlichen Kulturpflanzen, 3, 163-166, 1906. 
Ibid. .Enclosing single plants and its effect on a large number 
of important agricultural species: American Breeder’s Asso- 
ciation, 2, 197, 1906. 
(4) Kirchner, O.. Uber die Wirtung der Selbstbestaubung bei den 
Papilionaceen: Naturwissenschaftliche Zeitschrift fur Land- 
und Fonstwirtschaft, 3, 1-16, 1905. 
(5) Sirrine, F. A., Notes on methods of cross pollination: Iowa 
Agricultural Experiment Station, Bull. 13, 89-90, 1891. 
(6) Witte, Hernfrid, Om Sjalfsteriliteten hos Rbdklofvern: Svensk 
Botanisk Tidskrift, 2, 333-339, Stockholm, 1908. 
(7) Waldron, L. R., Fertilization of clover: North Dakota Agricul- 
tural Experiment Station, Report of the Dickinson Substation, 
1910, 7, 8, 1908. 
(8) Muller, Hermann, The Fertilization of Flowers, English trans- 
lation by D. W. Thompson, 184-l s 6, London, 1883. 
Beal, W. J Grasses of North America, 1, 325-328, New York, 
1896. 
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